Use install for build. Disable .net integration.

appveyor.yml

@@ -27,8 +27,6 @@ install:
   - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
   - "python -c \"import PyQt5\""
   - "pip --version"
-
-build_script:
   - cd /D %APPVEYOR_BUILD_FOLDER%
   - "pip install -r requirements.txt"
   - "python setup.py build"
@@ -38,6 +36,8 @@ build_script:
   - ps: "& 7z a -r ../$env:pomito_zip ."
   - ps: if (-not $env:APPVEYOR_PULL_REQUEST_NUMBER) { $pomito_path = $(Resolve-Path "../$env:pomito_zip"); curl.exe -fsS -k -u "$($env:bintray_user):$env:bintray_key" -X PUT "https://api.bintray.com/content/codito/generic/pomito/$env:APPVEYOR_BUILD_VERSION/$($env:pomito_zip)?publish=1" --data-binary "@$pomito_path" }
 
+build: false
+
 on_finish:
   - cd /D %APPVEYOR_BUILD_FOLDER%
   - ps: $log = "$env:temp/pyqt_extract_log.txt"; if (Test-Path $log) { Push-AppVeyorArtifact $log }