Maybe?

Author: ManlyMarco

.github/workflows/nuget.yml

@@ -28,7 +28,7 @@ jobs:
       run: |
         nuget restore
         nuget restore modules\mcs\mcs.sln
-        gci -Recurse -Filter *.nuspec | foreach { nuget pack "$($_.DirectoryName)\$($_.BaseName).csproj" -build /p:Version=$(Build.BuildNumber) -properties Configuration=Release }
+        gci -Recurse -Filter *.nuspec | foreach { msbuild -t:pack "$($_.DirectoryName)\$($_.BaseName).csproj" -build /p:Version=$(Build.BuildNumber) -properties Configuration=Release }
       
     - name: Nuget push
       working-directory: .