the last windows build failed because PyInstall exited with a (non-critical?) error. It does that during the build process, and it doesn't matter on my builds on gitlab.

What *does* matter is that GitHub apparenlty injects the following line to the top of all powershell scripts per https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions#exit-codes-and-error-action-preference

 $ErrorActionPreference = 'stop'

The fix is apparently to define a custom shell, not 'powershell' to prevent this. Let's try it.

Author: maltfield

.github/workflows/build.yml

@@ -43,7 +43,7 @@ jobs:
 
     - name: Execute script to .exe in Windows
       run: "build/windows/buildExe.ps1"
-      shell: powershell
+      shell: powershell -Command "& '{0}'"
 
     - uses: actions/upload-artifact@v2
       with: