Fix PowerShell issue with relative paths

azure-pipelines/templates/build-job.yml

@@ -7,7 +7,17 @@ jobs:
   steps:
   - checkout: self
     submodules: true
-    
+
+# We need this temporary step to have a consistent version of PowerShell on all images.
+  - task: PowerShell@2
+    displayName: 'Update PowerShell version for macOS'
+    condition: eq(variables['Platform'], 'darwin')
+    inputs:
+      TargetType: inline
+      script: |
+        brew update
+        brew cask upgrade powershell
+
   - task: PowerShell@2
     displayName: 'Build Python $(VERSION)'
     inputs: