Gulp build fails with: Error: Broken @import declaration of “”

I am currently working on a project that involves an Angular.js frontend and the build server running on a machine behind a corporate proxy. From time to time this error occurs:

Error: Broken @import declaration of “

All the other tasks such as bower install work fine because we set the proxy for bower, npm and git. After some research it became clear that the clean-css dependency that is used by gulp-minify-css  is the problem. This plugin ignores the proxy settings and tries to resolve the import declaration directly. Solution is very easy: just set a HTTP_PROXY environment variable with your proxy and everything works just fine.

This issue here describes some more possibilities to get around this problem.

gulp-nodemon: Object # has no method ‘spawnSync’

gulp-nodemon is a nice tool if you want to restart your node process when your source code changes. It is very easy to use. Just take this snippet from their sample code and modify the script to your needs.

gulp.task('develop', function () {
  nodemon({ script: 'server.js'
          , ext: 'html js'
          , ignore: ['ignored.js']
          , tasks: ['lint'] })
    .on('restart', function () {

Just fire up “gulp develop” and the server will start.

You might receive the following error: Object #<Object> has no method ‘spawnSync’

In this case check your node version (e.g. mine was 0.10.26). As stated in the release notes (here) you need to use Node.js version 0.12 in order to use it. You either use an older version of gulp-nodemon or upgrade your Node.js installation to the correct version.