diff --git a/utils/build.ps1 b/utils/build.ps1
index 13654f9b09643..ce34a8851faeb 100644
--- a/utils/build.ps1
+++ b/utils/build.ps1
@@ -1669,18 +1669,23 @@ function Build-Foundation([Platform]$Platform, $Arch, [switch]$Test = $false) {
         -Arch $HostArch
     }
 
-    # swift-corelibs-foundation tests are disabled since the package does not build for Windows yet
-    # $OutDir = Join-Path -Path $HostArch.BinaryCache -ChildPath foundation-tests
-
-    # Isolate-EnvVars {
-    #   $env:SWIFTCI_USE_LOCAL_DEPS=1
-    #   $env:DISPATCH_INCLUDE_PATH="$($Arch.SDKInstallRoot)/usr/lib/swift"
-    #   Build-SPMProject `
-    #     -Test `
-    #     -Src $SourceCache\swift-corelibs-foundation `
-    #     -Bin $OutDir `
-    #     -Arch $HostArch
-    # }
+    $OutDir = Join-Path -Path $HostArch.BinaryCache -ChildPath foundation-tests
+    $ShortArch = $Arch.LLVMName
+
+    Isolate-EnvVars {
+      $env:SWIFTCI_USE_LOCAL_DEPS=1
+      $env:DISPATCH_INCLUDE_PATH="$($Arch.SDKInstallRoot)/usr/lib/swift"
+      $env:LIBXML_LIBRARY_PATH="$LibraryRoot/libxml2-2.11.5/usr/lib/$Platform/$ShortArch"
+      $env:LIBXML_INCLUDE_PATH="$LibraryRoot/libxml2-2.11.5/usr/include/libxml2"
+      $env:ZLIB_LIBRARY_PATH="$LibraryRoot/zlib-1.3.1/usr/lib/$Platform/$ShortArch"
+      $env:CURL_LIBRARY_PATH="$LibraryRoot/curl-8.9.1/usr/lib/$Platform/$ShortArch"
+      $env:CURL_INCLUDE_PATH="$LibraryRoot/curl-8.9.1/usr/include"
+      Build-SPMProject `
+        -Test `
+        -Src $SourceCache\swift-corelibs-foundation `
+        -Bin $OutDir `
+        -Arch $HostArch
+    }
   } else {
     $DispatchBinaryCache = Get-TargetProjectBinaryCache $Arch Dispatch
     $FoundationBinaryCache = Get-TargetProjectBinaryCache $Arch Foundation