message: Try first clean than verify of cache
diff: @@ -18,6 +18,7 @@ install:
  - ps: Install-Product node $env:nodejs_version $env:platform
  - node --version && npm --version
  - if exist node_modules rd /Q /S node_modules # workaround for npm install bug missing module dependencies
  + - npm cache clean
  - npm cache verify
  - npm install --production
  - node_modules\.bin\grunt package
  