diff --git a/packages/craftcms-garnish/webpack.config.js b/packages/craftcms-garnish/webpack.config.js
index 4006ff422c0..49a2f44a971 100644
--- a/packages/craftcms-garnish/webpack.config.js
+++ b/packages/craftcms-garnish/webpack.config.js
@@ -2,16 +2,7 @@
 /* globals module, require, __dirname */
 const { getConfig } = require('@craftcms/webpack');
 const MergeIntoSingleFilePlugin = require('webpack-merge-and-include-globally');
-const glob = require('glob');
-
-// chdir so the glob commands work when running from outside this dir
-process.chdir(__dirname);
-
-const files = glob.sync('lib/*.js');
-files.push('src/Garnish.js', ...glob.sync('src/Base*.js'));
-files.push(...glob.sync('src/*.js', {
-    ignore: files
-}));
+const {join} = require('path');
 
 module.exports = getConfig({
   context: __dirname,
@@ -20,7 +11,14 @@ module.exports = getConfig({
     plugins: [
       new MergeIntoSingleFilePlugin({
         files: {
-          'garnish.js': files
+          'garnish.js': [
+
+            // Make paths absolute so this can be run from Craft root as well
+            join(__dirname, 'lib/*.js'),
+            join(__dirname, 'src/Garnish.js'),
+            join(__dirname, 'src/Base*.js'),
+            join(__dirname, 'src/!(Garnish|Base*).js')
+          ]
         }
       }),
     ],