gulpfile.js
function minifyCss() {
  var stream = gulp.src([compiled.css + '/**/*', '!' + compiled.css + '/styleguide*'])
    .pipe(plugins.minifyCss())
    .pipe(plugins.rename({ suffix: '.min' }))
    .pipe(gulp.dest(dist.css));
  return stream;
}
function minifyCss() {
  var stream = gulp.src([compiled.css + '/**/*', '!' + compiled.css + '/styleguide*'])
    .pipe(plugins.minifyCss())
    .pipe(plugins.rename({ suffix: '.min' }))
    .pipe(gulp.dest(dist.css));
  return stream;
}
function minifyCss ( ) { var stream = gulp . src ( [ compiled . css + '/**/*' , '!' + compiled . css + '/styleguide*' ] ) . pipe ( plugins . minifyCss ( ) ) . pipe ( plugins . rename ( { suffix : '.min' } ) ) . pipe ( gulp . dest ( dist . css ) ) ; return stream ; }
minify css from public dir and drop into dist dir
minify css from public dir and drop into dist dir