diff --git a/Gruntfile.coffee b/Gruntfile.coffee
index dd3b941bb..70e3b0cd0 100644
--- a/Gruntfile.coffee
+++ b/Gruntfile.coffee
@@ -172,7 +172,7 @@ module.exports = (grunt) ->
   grunt.loadNpmTasks('grunt-shell')
   grunt.loadTasks('tasks')
 
-  grunt.registerTask('compile', ['coffee', 'less', 'cson'])
+  grunt.registerTask('compile', ['coffee', 'cson'])
   grunt.registerTask('lint', ['coffeelint', 'csslint', 'lesslint'])
   grunt.registerTask('test', ['shell:kill-atom', 'shell:test'])
   grunt.registerTask('ci', ['lint', 'update-atom-shell', 'build', 'set-development-version', 'test'])
diff --git a/tasks/build-task.coffee b/tasks/build-task.coffee
index c6a1ff211..946d8e3c9 100644
--- a/tasks/build-task.coffee
+++ b/tasks/build-task.coffee
@@ -49,11 +49,11 @@ module.exports = (grunt) ->
     for directory in nonPackageDirectories
       cp directory, path.join(appDir, directory), filter: nodeModulesFilter
     for directory in packageDirectories
-      cp directory, path.join(appDir, directory), filter: /.+\.(cson|coffee|less)$/
+      cp directory, path.join(appDir, directory), filter: /.+\.(cson|coffee)$/
 
     cp 'spec', path.join(appDir, 'spec')
-    cp 'src', path.join(appDir, 'src'), filter: /.+\.(cson|coffee|less)$/
-    cp 'static', path.join(appDir, 'static'), filter: /.+\.less$/
+    cp 'src', path.join(appDir, 'src'), filter: /.+\.(cson|coffee)$/
+    cp 'static', path.join(appDir, 'static')
 
     grunt.file.recurse path.join('resources', 'mac'), (sourcePath, rootDirectory, subDirectory='', filename) ->
       unless /.+\.plist/.test(sourcePath)