Try some more pwsh.exe

.gitlab-ci-build.yml.in

@@ -79,10 +79,14 @@ hyperv-iso.amd64:
     tag: hyperv
   parallel:
     matrix: []
+  script:
+    - echo $env:COMMAND > build.ps1
+    - echo 'if (-not $?) { throw "Error in build"}' >> build.ps1
+    - pwsh.exe .\build.ps1
   after_script: |-
-    if [ "$CI_JOB_STATUS" == "success" ]; then
+    if ( "$CI_JOB_STATUS" -eq "success" ) {
       xonsh test.xsh
-    fi
+    }
 
 "Create release":
   stage: release