add rename and unzip logic

Author: miniksa

build/Helix/PrepareHelixPayload.ps1

@@ -54,7 +54,11 @@ Copy-Item "build\helix\InstallTestAppDependencies.ps1" "$payloadDir"
 Copy-Item "build\Helix\EnsureMachineState.ps1" "$payloadDir"
 
 # Copy the APPX package from the 'drop' artifact dir
-Copy-Item "$repoDirectory\Artifacts\$ArtifactName\appx\CascadiaPackage_0.0.1.0_$Platform.msix" $payloadDir
+Copy-Item "$repoDirectory\Artifacts\$ArtifactName\appx\CascadiaPackage_0.0.1.0_$Platform.msix" $payloadDir\CascadiaPackage.zip
+
+# Rename it to extension of ZIP because Expand-Archive is real sassy on the build machines
+# and refuses to unzip it because of its file extension while on a desktop, it just 
+# does the job without complaining.
 
 # Extract the APPX package
-Expand-Archive -LiteralPath $payloadDir\CascadiaPackage_0.0.1.0_$Platform.msix -DestinationPath $payloadDir\appx
+Expand-Archive -LiteralPath $payloadDir\CascadiaPackage.zip -DestinationPath $payloadDir\appx