Solution preventing java.lang.OutOfMemoryError: PermGen space in scala

Today i was trying to build my fabricator library and faced with this nasty "java.lang.OutOfMemoryError: PermGen space" error. Here i would like to write down a simple solution for unix users :

If you're a Mac user and have installed sbt via brew ( recommend you to do it), then all you need to do is :
- Create ~/.sbtconfig file
- Add export SBT_OPTS="-XX:+CMSClassUnloadingEnabled -XX:PermSize=512M -XX:MaxPermSize=1024M" to it.
- Restart your sbt and it should work fine now

In case if you are linux user, you can simply add this export line into your ~/.bash_profile file.