Merge pull request #150 from s4wny/patch-1

Update README.md, fixes #149

Author: progrium

README.md

@@ -9,7 +9,7 @@ Heroku-style application builds using Docker and Buildpacks. Used by [Dokku](htt
 
 ## Supported Buildpacks
 
-Buildpacks should generally just work, but many of them make assumptions about their environment. So Buildstep has a [list of officially supported buildpacks](https://github.com/gliderlabs/herokuish/blob/master/include/buildpacks.txt) that are built-in and ready to be used.
+Buildpacks should generally just work, but many of them make assumptions about their environment. So Buildstep has a [list of officially supported buildpacks](https://github.com/gliderlabs/herokuish/tree/master/buildpacks) that are built-in and ready to be used.
 
 
 ## Building Buildstep