diff --git a/packages/android_alarm_manager/example/pubspec.yaml b/packages/android_alarm_manager/example/pubspec.yaml
index e948ac2994ab..b2a3838df958 100644
--- a/packages/android_alarm_manager/example/pubspec.yaml
+++ b/packages/android_alarm_manager/example/pubspec.yaml
@@ -29,5 +29,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: '>=2.12.0-259.9.beta <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
   flutter: ">=1.20.0"
diff --git a/packages/android_alarm_manager/pubspec.yaml b/packages/android_alarm_manager/pubspec.yaml
index 3934de6f06fe..25f90dae1235 100644
--- a/packages/android_alarm_manager/pubspec.yaml
+++ b/packages/android_alarm_manager/pubspec.yaml
@@ -21,5 +21,5 @@ flutter:
         pluginClass: AndroidAlarmManagerPlugin
 
 environment:
-  sdk: '>=2.12.0-259.9.beta <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
   flutter: ">=1.20.0"
diff --git a/packages/android_intent/example/pubspec.yaml b/packages/android_intent/example/pubspec.yaml
index 0104749828c8..fc976088d610 100644
--- a/packages/android_intent/example/pubspec.yaml
+++ b/packages/android_intent/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/android_intent/pubspec.yaml b/packages/android_intent/pubspec.yaml
index 8a80370a78a3..7459e1ba1666 100644
--- a/packages/android_intent/pubspec.yaml
+++ b/packages/android_intent/pubspec.yaml
@@ -24,5 +24,5 @@ dev_dependencies:
   build_runner: ^1.11.1
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/battery/battery/example/pubspec.yaml b/packages/battery/battery/example/pubspec.yaml
index a2a65278c037..15ba3ea829d6 100644
--- a/packages/battery/battery/example/pubspec.yaml
+++ b/packages/battery/battery/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/battery/battery/pubspec.yaml b/packages/battery/battery/pubspec.yaml
index 4a93af02b0ea..1c2ca494e195 100644
--- a/packages/battery/battery/pubspec.yaml
+++ b/packages/battery/battery/pubspec.yaml
@@ -29,5 +29,5 @@ dev_dependencies:
   test: ^1.16.3
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/battery/battery_platform_interface/pubspec.yaml b/packages/battery/battery_platform_interface/pubspec.yaml
index 1303c22b5614..a5e606816d38 100644
--- a/packages/battery/battery_platform_interface/pubspec.yaml
+++ b/packages/battery/battery_platform_interface/pubspec.yaml
@@ -18,5 +18,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/camera/camera/example/pubspec.yaml b/packages/camera/camera/example/pubspec.yaml
index 0c06de9aea7e..89955872eb3f 100644
--- a/packages/camera/camera/example/pubspec.yaml
+++ b/packages/camera/camera/example/pubspec.yaml
@@ -28,5 +28,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.22.0"
diff --git a/packages/camera/camera/pubspec.yaml b/packages/camera/camera/pubspec.yaml
index 58bfa85d6b99..1ecc2dca5763 100644
--- a/packages/camera/camera/pubspec.yaml
+++ b/packages/camera/camera/pubspec.yaml
@@ -38,5 +38,5 @@ flutter:
         pluginClass: CameraPlugin
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.22.0"
diff --git a/packages/camera/camera_platform_interface/pubspec.yaml b/packages/camera/camera_platform_interface/pubspec.yaml
index 12c5bc48b9ec..20fcc900a005 100644
--- a/packages/camera/camera_platform_interface/pubspec.yaml
+++ b/packages/camera/camera_platform_interface/pubspec.yaml
@@ -20,5 +20,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: '>=2.12.0-259.9.beta <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
   flutter: ">=1.22.0"
diff --git a/packages/connectivity/connectivity/example/pubspec.yaml b/packages/connectivity/connectivity/example/pubspec.yaml
index 2eb69539e7fd..756d16b45e15 100644
--- a/packages/connectivity/connectivity/example/pubspec.yaml
+++ b/packages/connectivity/connectivity/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/connectivity/connectivity/pubspec.yaml b/packages/connectivity/connectivity/pubspec.yaml
index 85985dd45565..34a870690a79 100644
--- a/packages/connectivity/connectivity/pubspec.yaml
+++ b/packages/connectivity/connectivity/pubspec.yaml
@@ -37,5 +37,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/connectivity/connectivity_for_web/example/pubspec.yaml b/packages/connectivity/connectivity_for_web/example/pubspec.yaml
index 54289bc648ec..a4bb5f71d826 100644
--- a/packages/connectivity/connectivity_for_web/example/pubspec.yaml
+++ b/packages/connectivity/connectivity_for_web/example/pubspec.yaml
@@ -17,5 +17,5 @@ dev_dependencies:
     sdk: flutter
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.27.0-0" # For integration_test from sdk
diff --git a/packages/connectivity/connectivity_for_web/pubspec.yaml b/packages/connectivity/connectivity_for_web/pubspec.yaml
index 5c673e83b44a..5ece5ca7ab1f 100644
--- a/packages/connectivity/connectivity_for_web/pubspec.yaml
+++ b/packages/connectivity/connectivity_for_web/pubspec.yaml
@@ -22,5 +22,5 @@ dev_dependencies:
     sdk: flutter
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/connectivity/connectivity_macos/example/pubspec.yaml b/packages/connectivity/connectivity_macos/example/pubspec.yaml
index 27baef73b30c..c697d87e6123 100644
--- a/packages/connectivity/connectivity_macos/example/pubspec.yaml
+++ b/packages/connectivity/connectivity_macos/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.10.0"
diff --git a/packages/connectivity/connectivity_macos/pubspec.yaml b/packages/connectivity/connectivity_macos/pubspec.yaml
index 860b16497bc6..b78db9baa0d2 100644
--- a/packages/connectivity/connectivity_macos/pubspec.yaml
+++ b/packages/connectivity/connectivity_macos/pubspec.yaml
@@ -10,7 +10,7 @@ flutter:
         pluginClass: ConnectivityPlugin
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/connectivity/connectivity_platform_interface/pubspec.yaml b/packages/connectivity/connectivity_platform_interface/pubspec.yaml
index 5cc953aeb1b4..0a8df8a3331a 100644
--- a/packages/connectivity/connectivity_platform_interface/pubspec.yaml
+++ b/packages/connectivity/connectivity_platform_interface/pubspec.yaml
@@ -17,5 +17,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/device_info/device_info/example/pubspec.yaml b/packages/device_info/device_info/example/pubspec.yaml
index 5c158a3398d0..90462444609b 100644
--- a/packages/device_info/device_info/example/pubspec.yaml
+++ b/packages/device_info/device_info/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/device_info/device_info/pubspec.yaml b/packages/device_info/device_info/pubspec.yaml
index 0196338223a6..c8c1e5c6420b 100644
--- a/packages/device_info/device_info/pubspec.yaml
+++ b/packages/device_info/device_info/pubspec.yaml
@@ -24,5 +24,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/device_info/device_info_platform_interface/pubspec.yaml b/packages/device_info/device_info_platform_interface/pubspec.yaml
index 4753c70984a4..5123ffb4576e 100644
--- a/packages/device_info/device_info_platform_interface/pubspec.yaml
+++ b/packages/device_info/device_info_platform_interface/pubspec.yaml
@@ -18,5 +18,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.9.1+hotfix.4"
diff --git a/packages/espresso/example/pubspec.yaml b/packages/espresso/example/pubspec.yaml
index fe40421fc1cf..41cc8cdac6b4 100644
--- a/packages/espresso/example/pubspec.yaml
+++ b/packages/espresso/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the espresso plugin.
 publish_to: none
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/espresso/pubspec.yaml b/packages/espresso/pubspec.yaml
index 90b485fdc48d..9adf90a03bfa 100644
--- a/packages/espresso/pubspec.yaml
+++ b/packages/espresso/pubspec.yaml
@@ -4,7 +4,7 @@ version: 0.1.0
 homepage: https://github.com/flutter/plugins/espresso
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/file_selector/file_selector/example/pubspec.yaml b/packages/file_selector/file_selector/example/pubspec.yaml
index b2bbbb0d3e92..4987c836ad63 100644
--- a/packages/file_selector/file_selector/example/pubspec.yaml
+++ b/packages/file_selector/file_selector/example/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: none
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/file_selector/file_selector/pubspec.yaml b/packages/file_selector/file_selector/pubspec.yaml
index d8d610266641..df1bb3028aad 100644
--- a/packages/file_selector/file_selector/pubspec.yaml
+++ b/packages/file_selector/file_selector/pubspec.yaml
@@ -23,5 +23,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/file_selector/file_selector_platform_interface/pubspec.yaml b/packages/file_selector/file_selector_platform_interface/pubspec.yaml
index 74b9d08c77ec..7a1bdcef7ab7 100644
--- a/packages/file_selector/file_selector_platform_interface/pubspec.yaml
+++ b/packages/file_selector/file_selector_platform_interface/pubspec.yaml
@@ -20,5 +20,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/file_selector/file_selector_web/example/pubspec.yaml b/packages/file_selector/file_selector_web/example/pubspec.yaml
index cae4b13a8207..966debe2fece 100644
--- a/packages/file_selector/file_selector_web/example/pubspec.yaml
+++ b/packages/file_selector/file_selector_web/example/pubspec.yaml
@@ -17,5 +17,5 @@ dev_dependencies:
     sdk: flutter
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.27.0-0" # For integration_test from sdk
diff --git a/packages/file_selector/file_selector_web/pubspec.yaml b/packages/file_selector/file_selector_web/pubspec.yaml
index 17f0f476cbac..bbd5123cb12e 100644
--- a/packages/file_selector/file_selector_web/pubspec.yaml
+++ b/packages/file_selector/file_selector_web/pubspec.yaml
@@ -24,5 +24,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/flutter_plugin_android_lifecycle/example/pubspec.yaml b/packages/flutter_plugin_android_lifecycle/example/pubspec.yaml
index e0d225c032f4..d2f271d3844f 100644
--- a/packages/flutter_plugin_android_lifecycle/example/pubspec.yaml
+++ b/packages/flutter_plugin_android_lifecycle/example/pubspec.yaml
@@ -21,7 +21,7 @@ dev_dependencies:
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 flutter:
   uses-material-design: true
diff --git a/packages/flutter_plugin_android_lifecycle/pubspec.yaml b/packages/flutter_plugin_android_lifecycle/pubspec.yaml
index 62169e4389fc..6e57bd895db1 100644
--- a/packages/flutter_plugin_android_lifecycle/pubspec.yaml
+++ b/packages/flutter_plugin_android_lifecycle/pubspec.yaml
@@ -4,7 +4,7 @@ version: 2.0.1
 homepage: https://github.com/flutter/plugins/tree/master/packages/flutter_plugin_android_lifecycle
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/google_maps_flutter/google_maps_flutter/example/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter/example/pubspec.yaml
index 0035c96d69ab..74135b31e8d7 100644
--- a/packages/google_maps_flutter/google_maps_flutter/example/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the google_maps_flutter plugin.
 publish_to: none
 
 environment:
-  sdk: '>=2.12.0-259.9.beta <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
   flutter: ">=1.22.0"
 
 dependencies:
diff --git a/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml
index c406afd64564..8c6de691ecf3 100644
--- a/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml
@@ -32,5 +32,5 @@ flutter:
         pluginClass: FLTGoogleMapsPlugin
 
 environment:
-  sdk: '>=2.12.0-259.9.beta <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
   flutter: ">=1.22.0"
diff --git a/packages/google_maps_flutter/google_maps_flutter_platform_interface/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter_platform_interface/pubspec.yaml
index 4bce4aa8a5a1..1fdd97d51141 100644
--- a/packages/google_maps_flutter/google_maps_flutter_platform_interface/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter_platform_interface/pubspec.yaml
@@ -20,5 +20,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: '>=2.12.0-259.9.beta <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
   flutter: ">=1.9.1+hotfix.4"
diff --git a/packages/google_sign_in/google_sign_in/example/pubspec.yaml b/packages/google_sign_in/google_sign_in/example/pubspec.yaml
index 721e77e64e68..4f10b4a55eb3 100755
--- a/packages/google_sign_in/google_sign_in/example/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.4"
diff --git a/packages/google_sign_in/google_sign_in/pubspec.yaml b/packages/google_sign_in/google_sign_in/pubspec.yaml
index edcd6e8f8017..388814bb1409 100644
--- a/packages/google_sign_in/google_sign_in/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in/pubspec.yaml
@@ -33,5 +33,5 @@ dev_dependencies:
     sdk: flutter
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/google_sign_in/google_sign_in_platform_interface/pubspec.yaml b/packages/google_sign_in/google_sign_in_platform_interface/pubspec.yaml
index 195bff28d992..3e3281136c78 100644
--- a/packages/google_sign_in/google_sign_in_platform_interface/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in_platform_interface/pubspec.yaml
@@ -18,5 +18,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/google_sign_in/google_sign_in_web/example/pubspec.yaml b/packages/google_sign_in/google_sign_in_web/example/pubspec.yaml
index 385b2ea0861e..72a13b1a729e 100644
--- a/packages/google_sign_in/google_sign_in_web/example/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in_web/example/pubspec.yaml
@@ -2,7 +2,7 @@ name: google_sign_in_web_integration_tests
 publish_to: none
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.27.0-0" # For integration_test from sdk
 
 dependencies:
diff --git a/packages/google_sign_in/google_sign_in_web/pubspec.yaml b/packages/google_sign_in/google_sign_in_web/pubspec.yaml
index ae6807cd9231..52eedf8f34ce 100644
--- a/packages/google_sign_in/google_sign_in_web/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in_web/pubspec.yaml
@@ -26,5 +26,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/image_picker/image_picker/example/pubspec.yaml b/packages/image_picker/image_picker/example/pubspec.yaml
index a52b0f5c0f88..68162b21c6a4 100755
--- a/packages/image_picker/image_picker/example/pubspec.yaml
+++ b/packages/image_picker/image_picker/example/pubspec.yaml
@@ -26,5 +26,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.10.0"
diff --git a/packages/image_picker/image_picker/pubspec.yaml b/packages/image_picker/image_picker/pubspec.yaml
index 73c6a6ed1824..e6351281663a 100755
--- a/packages/image_picker/image_picker/pubspec.yaml
+++ b/packages/image_picker/image_picker/pubspec.yaml
@@ -32,5 +32,5 @@ dev_dependencies:
   plugin_platform_interface: ^2.0.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.10.0"
diff --git a/packages/image_picker/image_picker_for_web/pubspec.yaml b/packages/image_picker/image_picker_for_web/pubspec.yaml
index 045be48eb1c5..fa2fe9de18f0 100644
--- a/packages/image_picker/image_picker_for_web/pubspec.yaml
+++ b/packages/image_picker/image_picker_for_web/pubspec.yaml
@@ -25,5 +25,5 @@ dev_dependencies:
     sdk: flutter
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/image_picker/image_picker_platform_interface/pubspec.yaml b/packages/image_picker/image_picker_platform_interface/pubspec.yaml
index bd197a6f194c..5943c84e7dd3 100644
--- a/packages/image_picker/image_picker_platform_interface/pubspec.yaml
+++ b/packages/image_picker/image_picker_platform_interface/pubspec.yaml
@@ -18,5 +18,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.10.0"
diff --git a/packages/in_app_purchase/in_app_purchase/example/pubspec.yaml b/packages/in_app_purchase/in_app_purchase/example/pubspec.yaml
index 6625cb92e77c..1acddc181b93 100644
--- a/packages/in_app_purchase/in_app_purchase/example/pubspec.yaml
+++ b/packages/in_app_purchase/in_app_purchase/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.9.1+hotfix.2"
diff --git a/packages/in_app_purchase/in_app_purchase/pubspec.yaml b/packages/in_app_purchase/in_app_purchase/pubspec.yaml
index c7226078c722..d862125c1d29 100644
--- a/packages/in_app_purchase/in_app_purchase/pubspec.yaml
+++ b/packages/in_app_purchase/in_app_purchase/pubspec.yaml
@@ -32,5 +32,5 @@ flutter:
         pluginClass: InAppPurchasePlugin
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/ios_platform_images/example/pubspec.yaml b/packages/ios_platform_images/example/pubspec.yaml
index e87dd59d25ae..c3b5729d82cc 100644
--- a/packages/ios_platform_images/example/pubspec.yaml
+++ b/packages/ios_platform_images/example/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none
 homepage: https://github.com/flutter/plugins/tree/master/packages/ios_platform_images/ios_platform_images
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/ios_platform_images/pubspec.yaml b/packages/ios_platform_images/pubspec.yaml
index 820542bcc362..6826f2f40695 100644
--- a/packages/ios_platform_images/pubspec.yaml
+++ b/packages/ios_platform_images/pubspec.yaml
@@ -4,7 +4,7 @@ version: 0.2.0
 homepage: https://github.com/flutter/plugins/tree/master/packages/ios_platform_images/ios_platform_images
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
 
 dependencies:
diff --git a/packages/local_auth/example/pubspec.yaml b/packages/local_auth/example/pubspec.yaml
index 7cc6b392e21e..e7cc7a226d86 100644
--- a/packages/local_auth/example/pubspec.yaml
+++ b/packages/local_auth/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/local_auth/pubspec.yaml b/packages/local_auth/pubspec.yaml
index 3b59bab9c541..e70d18ef36de 100644
--- a/packages/local_auth/pubspec.yaml
+++ b/packages/local_auth/pubspec.yaml
@@ -31,5 +31,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/package_info/example/pubspec.yaml b/packages/package_info/example/pubspec.yaml
index 139b9e211449..46e95e7b9db8 100644
--- a/packages/package_info/example/pubspec.yaml
+++ b/packages/package_info/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/package_info/pubspec.yaml b/packages/package_info/pubspec.yaml
index dac73571fd33..449543beb370 100644
--- a/packages/package_info/pubspec.yaml
+++ b/packages/package_info/pubspec.yaml
@@ -29,5 +29,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/path_provider/path_provider/example/pubspec.yaml b/packages/path_provider/path_provider/example/pubspec.yaml
index 6ebde4342e7f..cf9f3dc8d6cf 100644
--- a/packages/path_provider/path_provider/example/pubspec.yaml
+++ b/packages/path_provider/path_provider/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/path_provider/path_provider/pubspec.yaml b/packages/path_provider/path_provider/pubspec.yaml
index 6cb451344a3d..f401eb0beb3c 100644
--- a/packages/path_provider/path_provider/pubspec.yaml
+++ b/packages/path_provider/path_provider/pubspec.yaml
@@ -38,5 +38,5 @@ dev_dependencies:
   test: ^1.16.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/path_provider/path_provider_linux/example/pubspec.yaml b/packages/path_provider/path_provider_linux/example/pubspec.yaml
index c9c2f47bf654..f59c7435dc74 100644
--- a/packages/path_provider/path_provider_linux/example/pubspec.yaml
+++ b/packages/path_provider/path_provider_linux/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the path_provider_linux plugin.
 publish_to: "none"
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/path_provider/path_provider_linux/pubspec.yaml b/packages/path_provider/path_provider_linux/pubspec.yaml
index a3cdff34b6cc..5d1c395aa418 100644
--- a/packages/path_provider/path_provider_linux/pubspec.yaml
+++ b/packages/path_provider/path_provider_linux/pubspec.yaml
@@ -11,7 +11,7 @@ flutter:
         pluginClass: none
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/path_provider/path_provider_macos/example/pubspec.yaml b/packages/path_provider/path_provider_macos/example/pubspec.yaml
index f91678c1fb2a..6ca5ea154176 100644
--- a/packages/path_provider/path_provider_macos/example/pubspec.yaml
+++ b/packages/path_provider/path_provider_macos/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/path_provider/path_provider_macos/pubspec.yaml b/packages/path_provider/path_provider_macos/pubspec.yaml
index 14f0b9556a6a..522ef0a369af 100644
--- a/packages/path_provider/path_provider_macos/pubspec.yaml
+++ b/packages/path_provider/path_provider_macos/pubspec.yaml
@@ -10,7 +10,7 @@ flutter:
         pluginClass: PathProviderPlugin
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/path_provider/path_provider_platform_interface/pubspec.yaml b/packages/path_provider/path_provider_platform_interface/pubspec.yaml
index eb445c9b8873..9ebb14e7c52c 100644
--- a/packages/path_provider/path_provider_platform_interface/pubspec.yaml
+++ b/packages/path_provider/path_provider_platform_interface/pubspec.yaml
@@ -18,5 +18,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/path_provider/path_provider_windows/example/pubspec.yaml b/packages/path_provider/path_provider_windows/example/pubspec.yaml
index 8843e2d770ff..4b3e8ec62180 100644
--- a/packages/path_provider/path_provider_windows/example/pubspec.yaml
+++ b/packages/path_provider/path_provider_windows/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/path_provider/path_provider_windows/pubspec.yaml b/packages/path_provider/path_provider_windows/pubspec.yaml
index 95d9f5dc8f61..d0badefc8d7e 100644
--- a/packages/path_provider/path_provider_windows/pubspec.yaml
+++ b/packages/path_provider/path_provider_windows/pubspec.yaml
@@ -25,5 +25,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/plugin_platform_interface/pubspec.yaml b/packages/plugin_platform_interface/pubspec.yaml
index 12a5b066bc61..a603ded228ba 100644
--- a/packages/plugin_platform_interface/pubspec.yaml
+++ b/packages/plugin_platform_interface/pubspec.yaml
@@ -17,7 +17,7 @@ version: 2.0.0
 repository: https://github.com/flutter/plugins/tree/master/packages/plugin_platform_interface
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   meta: ^1.3.0
diff --git a/packages/quick_actions/quick_actions/example/pubspec.yaml b/packages/quick_actions/quick_actions/example/pubspec.yaml
index 391b4c35e94c..5eecc6c20766 100644
--- a/packages/quick_actions/quick_actions/example/pubspec.yaml
+++ b/packages/quick_actions/quick_actions/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.9.1+hotfix.2"
diff --git a/packages/quick_actions/quick_actions_platform_interface/pubspec.yaml b/packages/quick_actions/quick_actions_platform_interface/pubspec.yaml
index eb1ff40bb4a4..0a52b2d39195 100644
--- a/packages/quick_actions/quick_actions_platform_interface/pubspec.yaml
+++ b/packages/quick_actions/quick_actions_platform_interface/pubspec.yaml
@@ -18,5 +18,5 @@ dev_dependencies:
   pedantic: ^1.11.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.22.0"
diff --git a/packages/sensors/example/pubspec.yaml b/packages/sensors/example/pubspec.yaml
index 884ebbb837af..3b25a6dd50cd 100644
--- a/packages/sensors/example/pubspec.yaml
+++ b/packages/sensors/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/sensors/pubspec.yaml b/packages/sensors/pubspec.yaml
index 8056d99d07ed..ab703cd37735 100644
--- a/packages/sensors/pubspec.yaml
+++ b/packages/sensors/pubspec.yaml
@@ -27,5 +27,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/share/example/pubspec.yaml b/packages/share/example/pubspec.yaml
index 31deb1f77230..37f02b8fa714 100644
--- a/packages/share/example/pubspec.yaml
+++ b/packages/share/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.9.1+hotfix.2"
diff --git a/packages/share/pubspec.yaml b/packages/share/pubspec.yaml
index 5f2c9f0a400b..a287e0a5ca8a 100644
--- a/packages/share/pubspec.yaml
+++ b/packages/share/pubspec.yaml
@@ -28,4 +28,4 @@ dev_dependencies:
 
 environment:
   flutter: ">=1.12.13+hotfix.5"
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
diff --git a/packages/shared_preferences/shared_preferences/example/pubspec.yaml b/packages/shared_preferences/shared_preferences/example/pubspec.yaml
index c3454a573c5b..a2493aa04ce9 100644
--- a/packages/shared_preferences/shared_preferences/example/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.9.1+hotfix.2"
diff --git a/packages/shared_preferences/shared_preferences/pubspec.yaml b/packages/shared_preferences/shared_preferences/pubspec.yaml
index ad809b2564bd..5ee958c1c487 100644
--- a/packages/shared_preferences/shared_preferences/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences/pubspec.yaml
@@ -46,5 +46,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/shared_preferences/shared_preferences_linux/example/pubspec.yaml b/packages/shared_preferences/shared_preferences_linux/example/pubspec.yaml
index 8b2c3933d03d..340314a5f18b 100644
--- a/packages/shared_preferences/shared_preferences_linux/example/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_linux/example/pubspec.yaml
@@ -24,5 +24,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/shared_preferences/shared_preferences_linux/pubspec.yaml b/packages/shared_preferences/shared_preferences_linux/pubspec.yaml
index 0730ca8d5fec..a573b7cff438 100644
--- a/packages/shared_preferences/shared_preferences_linux/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_linux/pubspec.yaml
@@ -11,7 +11,7 @@ flutter:
         pluginClass: none
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/shared_preferences/shared_preferences_macos/example/pubspec.yaml b/packages/shared_preferences/shared_preferences_macos/example/pubspec.yaml
index c64fda7db00b..b5a88511118a 100644
--- a/packages/shared_preferences/shared_preferences_macos/example/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_macos/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.8"
diff --git a/packages/shared_preferences/shared_preferences_macos/pubspec.yaml b/packages/shared_preferences/shared_preferences_macos/pubspec.yaml
index 24811830c1fd..b1c883352452 100644
--- a/packages/shared_preferences/shared_preferences_macos/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_macos/pubspec.yaml
@@ -10,7 +10,7 @@ flutter:
         pluginClass: SharedPreferencesPlugin
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/shared_preferences/shared_preferences_platform_interface/pubspec.yaml b/packages/shared_preferences/shared_preferences_platform_interface/pubspec.yaml
index 85c64a030036..8157c36888bd 100644
--- a/packages/shared_preferences/shared_preferences_platform_interface/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_platform_interface/pubspec.yaml
@@ -13,5 +13,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.8"
diff --git a/packages/shared_preferences/shared_preferences_web/pubspec.yaml b/packages/shared_preferences/shared_preferences_web/pubspec.yaml
index 9a14b218572a..86a6a4b834c4 100644
--- a/packages/shared_preferences/shared_preferences_web/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_web/pubspec.yaml
@@ -24,5 +24,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/shared_preferences/shared_preferences_windows/example/pubspec.yaml b/packages/shared_preferences/shared_preferences_windows/example/pubspec.yaml
index db6401c53fcf..a2b41ef1d3ac 100644
--- a/packages/shared_preferences/shared_preferences_windows/example/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_windows/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the shared_preferences_windows plugin.
 publish_to: none
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/shared_preferences/shared_preferences_windows/pubspec.yaml b/packages/shared_preferences/shared_preferences_windows/pubspec.yaml
index d804dd1ddb8f..cafb6b767045 100644
--- a/packages/shared_preferences/shared_preferences_windows/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_windows/pubspec.yaml
@@ -12,7 +12,7 @@ flutter:
         pluginClass: none
 
 environment:
-  sdk: '>=2.12.0-259.9.beta <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/url_launcher/url_launcher/example/pubspec.yaml b/packages/url_launcher/url_launcher/example/pubspec.yaml
index e56f76f977db..392d86d30601 100644
--- a/packages/url_launcher/url_launcher/example/pubspec.yaml
+++ b/packages/url_launcher/url_launcher/example/pubspec.yaml
@@ -26,5 +26,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/url_launcher/url_launcher/pubspec.yaml b/packages/url_launcher/url_launcher/pubspec.yaml
index c8c5163d0e97..83e9a99cadd6 100644
--- a/packages/url_launcher/url_launcher/pubspec.yaml
+++ b/packages/url_launcher/url_launcher/pubspec.yaml
@@ -44,5 +44,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/url_launcher/url_launcher_linux/example/pubspec.yaml b/packages/url_launcher/url_launcher_linux/example/pubspec.yaml
index 389f3fd82110..8ae4c5bc0c5b 100644
--- a/packages/url_launcher/url_launcher_linux/example/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_linux/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/url_launcher/url_launcher_linux/pubspec.yaml b/packages/url_launcher/url_launcher_linux/pubspec.yaml
index cc974094b2d0..2c1d9fbc26a1 100644
--- a/packages/url_launcher/url_launcher_linux/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_linux/pubspec.yaml
@@ -11,7 +11,7 @@ flutter:
         pluginClass: UrlLauncherPlugin
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/url_launcher/url_launcher_macos/example/pubspec.yaml b/packages/url_launcher/url_launcher_macos/example/pubspec.yaml
index 2e221dc061fb..6f842d6a8a0e 100644
--- a/packages/url_launcher/url_launcher_macos/example/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_macos/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/url_launcher/url_launcher_macos/pubspec.yaml b/packages/url_launcher/url_launcher_macos/pubspec.yaml
index 6b5e6cf2a825..95186f78b638 100644
--- a/packages/url_launcher/url_launcher_macos/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_macos/pubspec.yaml
@@ -12,7 +12,7 @@ flutter:
         fileName: url_launcher_macos.dart
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/url_launcher/url_launcher_platform_interface/pubspec.yaml b/packages/url_launcher/url_launcher_platform_interface/pubspec.yaml
index ee334f0e9a47..441156608cd2 100644
--- a/packages/url_launcher/url_launcher_platform_interface/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_platform_interface/pubspec.yaml
@@ -17,5 +17,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.22.0"
diff --git a/packages/url_launcher/url_launcher_web/example/pubspec.yaml b/packages/url_launcher/url_launcher_web/example/pubspec.yaml
index 51748610e971..fb5fae8b31eb 100644
--- a/packages/url_launcher/url_launcher_web/example/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_web/example/pubspec.yaml
@@ -18,5 +18,5 @@ dev_dependencies:
     sdk: flutter
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.26.0-0" # For integration_test from sdk
diff --git a/packages/url_launcher/url_launcher_web/pubspec.yaml b/packages/url_launcher/url_launcher_web/pubspec.yaml
index 371a40e16f7b..9e946deca2e4 100644
--- a/packages/url_launcher/url_launcher_web/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_web/pubspec.yaml
@@ -24,5 +24,5 @@ dev_dependencies:
     sdk: flutter
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/url_launcher/url_launcher_windows/example/pubspec.yaml b/packages/url_launcher/url_launcher_windows/example/pubspec.yaml
index a0fecd5919b8..fff33e40e63b 100644
--- a/packages/url_launcher/url_launcher_windows/example/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_windows/example/pubspec.yaml
@@ -25,5 +25,5 @@ flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/url_launcher/url_launcher_windows/pubspec.yaml b/packages/url_launcher/url_launcher_windows/pubspec.yaml
index e5b611f86af0..794fd06d487b 100644
--- a/packages/url_launcher/url_launcher_windows/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_windows/pubspec.yaml
@@ -11,7 +11,7 @@ flutter:
         pluginClass: UrlLauncherPlugin
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/video_player/video_player/example/pubspec.yaml b/packages/video_player/video_player/example/pubspec.yaml
index 6386a2beedf8..9cdedd9ff67e 100644
--- a/packages/video_player/video_player/example/pubspec.yaml
+++ b/packages/video_player/video_player/example/pubspec.yaml
@@ -31,5 +31,5 @@ flutter:
    - assets/bumble_bee_captions.srt
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/video_player/video_player/pubspec.yaml b/packages/video_player/video_player/pubspec.yaml
index 77b562347dea..fa7196ef0840 100644
--- a/packages/video_player/video_player/pubspec.yaml
+++ b/packages/video_player/video_player/pubspec.yaml
@@ -37,5 +37,5 @@ dev_dependencies:
   pigeon: ^0.1.21
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5"
diff --git a/packages/video_player/video_player_platform_interface/pubspec.yaml b/packages/video_player/video_player_platform_interface/pubspec.yaml
index 98e1c95a8e8f..5164a944bdc6 100644
--- a/packages/video_player/video_player_platform_interface/pubspec.yaml
+++ b/packages/video_player/video_player_platform_interface/pubspec.yaml
@@ -16,5 +16,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/video_player/video_player_web/pubspec.yaml b/packages/video_player/video_player_web/pubspec.yaml
index 7404896e04a4..dba7c8cbd885 100644
--- a/packages/video_player/video_player_web/pubspec.yaml
+++ b/packages/video_player/video_player_web/pubspec.yaml
@@ -24,5 +24,5 @@ dev_dependencies:
   pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
diff --git a/packages/webview_flutter/example/pubspec.yaml b/packages/webview_flutter/example/pubspec.yaml
index 84e916372143..3529ecc069c8 100644
--- a/packages/webview_flutter/example/pubspec.yaml
+++ b/packages/webview_flutter/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the webview_flutter plugin.
 publish_to: none
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/webview_flutter/pubspec.yaml b/packages/webview_flutter/pubspec.yaml
index f4fb0efe83e2..3f5f70b6717d 100644
--- a/packages/webview_flutter/pubspec.yaml
+++ b/packages/webview_flutter/pubspec.yaml
@@ -4,7 +4,7 @@ homepage: https://github.com/flutter/plugins/tree/master/packages/webview_flutte
 version: 2.0.4
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.22.0"
 
 dependencies:
diff --git a/packages/wifi_info_flutter/wifi_info_flutter/example/pubspec.yaml b/packages/wifi_info_flutter/wifi_info_flutter/example/pubspec.yaml
index 108bd398c7b6..6303907c32d6 100644
--- a/packages/wifi_info_flutter/wifi_info_flutter/example/pubspec.yaml
+++ b/packages/wifi_info_flutter/wifi_info_flutter/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the wifi_info_flutter plugin.
 publish_to: none
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   connectivity: ^3.0.0
diff --git a/packages/wifi_info_flutter/wifi_info_flutter/pubspec.yaml b/packages/wifi_info_flutter/wifi_info_flutter/pubspec.yaml
index 1742f9b86099..66729d7e79c6 100644
--- a/packages/wifi_info_flutter/wifi_info_flutter/pubspec.yaml
+++ b/packages/wifi_info_flutter/wifi_info_flutter/pubspec.yaml
@@ -4,7 +4,7 @@ homepage: https://github.com/flutter/plugins/tree/master/packages/wifi_info_flut
 version: 2.0.0
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:
diff --git a/packages/wifi_info_flutter/wifi_info_flutter_platform_interface/pubspec.yaml b/packages/wifi_info_flutter/wifi_info_flutter_platform_interface/pubspec.yaml
index b39f01ac4096..5043b0451f7b 100644
--- a/packages/wifi_info_flutter/wifi_info_flutter_platform_interface/pubspec.yaml
+++ b/packages/wifi_info_flutter/wifi_info_flutter_platform_interface/pubspec.yaml
@@ -6,7 +6,7 @@ version: 2.0.1
 homepage: https://github.com/flutter/plugins/tree/master/packages/wifi_info_flutter/wifi_info_flutter_platform_interface
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.17.0"
 
 dependencies:
diff --git a/script/tool/lib/src/publish_check_command.dart b/script/tool/lib/src/publish_check_command.dart
index 07bf0aa86673..0fb9dbad60a8 100644
--- a/script/tool/lib/src/publish_check_command.dart
+++ b/script/tool/lib/src/publish_check_command.dart
@@ -18,7 +18,17 @@ class PublishCheckCommand extends PluginCommand {
     Directory packagesDir,
     FileSystem fileSystem, {
     ProcessRunner processRunner = const ProcessRunner(),
-  }) : super(packagesDir, fileSystem, processRunner: processRunner);
+  }) : super(packagesDir, fileSystem, processRunner: processRunner) {
+    argParser.addFlag(
+      _allowPrereleaseFlag,
+      help: 'Allows the pre-release SDK warning to pass.\n'
+          'When enabled, a pub warning, which asks to publish the package as a pre-release version when '
+          'the SDK constraint is a pre-release version, is ignored.',
+      defaultsTo: false,
+    );
+  }
+
+  static const String _allowPrereleaseFlag = 'allow-pre-release';
 
   @override
   final String name = 'publish-check';
@@ -98,6 +108,10 @@ class PublishCheckCommand extends PluginCommand {
       return true;
     }
 
+    if (!(argResults[_allowPrereleaseFlag] as bool)) {
+      return false;
+    }
+
     await stdOutCompleter.future;
     await stdInCompleter.future;
 
diff --git a/script/tool/test/publish_check_command_test.dart b/script/tool/test/publish_check_command_test.dart
index 568d35eeff29..0a9d36f2ea6f 100644
--- a/script/tool/test/publish_check_command_test.dart
+++ b/script/tool/test/publish_check_command_test.dart
@@ -90,7 +90,7 @@ void main() {
           throwsA(isA<ToolExit>()));
     });
 
-    test('pass on prerelease', () async {
+    test('pass on prerelease if --allow-pre-release flag is on', () async {
       createFakePlugin('d');
 
       const String preReleaseOutput = 'Package has 1 warning.'
@@ -105,7 +105,26 @@ void main() {
 
       processRunner.processesToReturn.add(process);
 
-      expect(runner.run(<String>['publish-check']), completes);
+      expect(runner.run(<String>['publish-check', '--allow-pre-release']),
+          completes);
+    });
+
+    test('fail on prerelease if --allow-pre-release flag is off', () async {
+      createFakePlugin('d');
+
+      const String preReleaseOutput = 'Package has 1 warning.'
+          'Packages with an SDK constraint on a pre-release of the Dart SDK should themselves be published as a pre-release version.';
+
+      final MockProcess process = MockProcess();
+      process.stdoutController.add(preReleaseOutput.codeUnits);
+      process.stdoutController.close(); // ignore: unawaited_futures
+      process.stderrController.close(); // ignore: unawaited_futures
+
+      process.exitCodeCompleter.complete(1);
+
+      processRunner.processesToReturn.add(process);
+
+      expect(runner.run(<String>['publish-check']), throwsA(isA<ToolExit>()));
     });
   });
 }