diff --git a/README.md b/README.md
index d3a781f3..4908674e 100644
--- a/README.md
+++ b/README.md
@@ -58,9 +58,9 @@ You will then find the built library inside the `dist` folder, named `paper.js`.
 	stripped		Formated but without comments (default)
 	compressed		Uses UglifyJS to reduce file size
 
-In order for UglifyJS to work when building Paper.js, it needs to be located in a folder name `uglifyjs` on the same level as your `paper.js` project folder. Alternatively you can also adjust the path in `build/preprocess.sh`. You also need to make sure that node will find the uglifyjs library by making a symbolic link to it from `~/.node_libraries/uglify-js`, e.g.
+In to build a compressed version of Paper.js, UglifyJS version 1 needs to be installed:
 
-	ln -s ~/Development/JavaScript/uglifyjs ~/.node_libraries/uglify-js
+    npm install uglify-js@1
 
 ### Building the Documentation
 
diff --git a/build/preprocess.sh b/build/preprocess.sh
index 6624a3bb..9516956a 100755
--- a/build/preprocess.sh
+++ b/build/preprocess.sh
@@ -42,7 +42,7 @@ case $1 in
 		;;
 	compressed)
 		eval $COMMAND > temp.js
-		../../uglifyjs/bin/uglifyjs temp.js --extra --unsafe --reserved-names "_$_,$_" > $5
+		uglifyjs temp.js --extra --unsafe --reserved-names "_$_,$_" > $5
 		rm temp.js
 		;;
 esac