env not secret

You can only use the env context in the value of the with and name keys, or in a step’s if conditional, the secret value is not defined yet as its before the with.

.github/workflows/flutter-nightly.yml

@@ -153,7 +153,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Import the codesign cert
-        if: ${{ secrets.MACOS_P12_BASE64== 'true' }}
+        if: ${{ env.MACOS_P12_BASE64== 'true' }}
         uses: apple-actions/import-codesign-certs@v1
         with: 
           p12-file-base64: ${{ secrets.MACOS_P12_BASE64 }}