example of gulpfile to make css

gulpfile.js

@@ -0,0 +1,17 @@
+var gulp = require('gulp');
+var less = require('gulp-less');
+var path = require('path');
+var minifyCSS = require('gulp-minify-css');
+var rename = require('gulp-rename');
+ 
+gulp.task('less', function () {
+  return gulp.src('./jupyter_notebook/static/style/*.less')
+    .pipe(less({
+      paths: [ path.join(__dirname, 'less', 'includes') ]
+    }))
+    .pipe(minifyCSS())
+    .pipe(rename({
+            suffix: '.min'
+        }))
+    .pipe(gulp.dest('./jupyter_notebook/static/style'));
+});

package.json

@@ -1,16 +1,19 @@
 {
- "name": "jupyter-notebook-deps",
- "version": "4.0.0",
- "description": "Jupyter Notebook nodejs dependencies",
- "author": "Jupyter Developers",
- "license": "BSD",
- "repository": {
-  "type": "git",
-  "url": "https://github.com/jupyter/jupyter_notebook.git"
- },
- "devDependencies": {
-  "bower": "*",
-  "less": "~2",
-  "less-plugin-clean-css": "*"
- }
+  "name": "jupyter-notebook-deps",
+  "version": "4.0.0",
+  "description": "Jupyter Notebook nodejs dependencies",
+  "author": "Jupyter Developers",
+  "license": "BSD",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/jupyter/jupyter_notebook.git"
+  },
+  "devDependencies": {
+    "bower": "*",
+    "gulp": "^3.8.11",
+    "gulp-less": "^3.0.2",
+    "gulp-minify-css": "^1.0.0",
+    "gulp-rename": "^1.2.2",
+    "less": "~2"
+  }
 }