diff --git a/integration-tests/lerna-canary/lerna-canary.sh b/integration-tests/lerna-canary/lerna-canary.sh
new file mode 100755
index 00000000..aed51d2c
--- /dev/null
+++ b/integration-tests/lerna-canary/lerna-canary.sh
@@ -0,0 +1,38 @@
+# make sure errors stop the script
+set -e
+
+echo "add patch-package"
+yarn add $1
+
+echo "Add @parcel/codeframe"
+yarn add @parcel/codeframe@2.0.0-nightly.137
+
+echo "replace codeframe with yarn in @parcel/codefram/src/codeframe.js"
+npx replace codeframe yarn node_modules/@parcel/codeframe/src/codeframe.js
+
+echo "SNAPSHOT: making patch"
+npx patch-package @parcel/codeframe
+echo "END SNAPSHOT"
+
+echo "SNAPSHOT: the patch looks like this"
+cat patches/@parcel/codeframe+2.0.0-nightly.137.patch
+echo "END SNAPSHOT"
+
+echo "reinstall node_modules"
+npx rimraf node_modules
+yarn
+
+echo "patch-package didn't run"
+if grep yarn node_modules/@parcel/codeframe/src/codeframe.js ; then
+  exit 1
+fi
+
+echo "add patch-package to postinstall hook"
+node ./add-postinstall.js
+
+echo "reinstall node_modules"
+npx rimraf node_modules
+yarn
+
+echo "patch-package did run"
+grep yarn node_modules/@parcel/codeframe/src/codeframe.js
diff --git a/integration-tests/lerna-canary/lerna-canary.test.ts b/integration-tests/lerna-canary/lerna-canary.test.ts
new file mode 100644
index 00000000..0f55db35
--- /dev/null
+++ b/integration-tests/lerna-canary/lerna-canary.test.ts
@@ -0,0 +1,2 @@
+import { runIntegrationTest } from "../runIntegrationTest"
+runIntegrationTest({projectName: "lerna-canary", shouldProduceSnapshots: false})
diff --git a/integration-tests/lerna-canary/package.json b/integration-tests/lerna-canary/package.json
new file mode 100644
index 00000000..cfd3ae7e
--- /dev/null
+++ b/integration-tests/lerna-canary/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "lerna-canary",
+  "version": "1.0.0",
+  "description": "integration test for patch-package",
+  "main": "index.js",
+  "author": "",
+  "license": "ISC",
+  "dependencies": {}
+}
diff --git a/integration-tests/lerna-canary/yarn.lock b/integration-tests/lerna-canary/yarn.lock
new file mode 100644
index 00000000..fb57ccd1
--- /dev/null
+++ b/integration-tests/lerna-canary/yarn.lock
@@ -0,0 +1,4 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
diff --git a/src/getPackageResolution.ts b/src/getPackageResolution.ts
index 08a952e6..e33bf3cf 100644
--- a/src/getPackageResolution.ts
+++ b/src/getPackageResolution.ts
@@ -31,10 +31,12 @@ export function getPackageResolution({
       throw new Error("Can't parse lock file")
     }
 
-    const installedVersion = require(join(
+    const installedVersionLong = require(join(
       resolve(appPath, packageDetails.path),
       "package.json",
     )).version as string
+    const indexOfPlus = installedVersionLong.indexOf('+');
+    const installedVersion = indexOfPlus === -1 ? installedVersionLong : installedVersionLong.substring(0, indexOfPlus)
 
     const entries = Object.entries(appLockFile.object).filter(
       ([k, v]) =>