richardbutler/node-spritesheet — pull request #40 by Freckz (2013-12-17 14:50:49+00:00)
Title: Grunt fail on install hook when a dependency (coffee or clean) is alread...

...y installed in a parent dir.

#37

see the discussion here: https://github.com/gruntjs/grunt/issues/696.

The easiest solution is to manually run Grunt before publishing and publish lib folder.
Grunt 0.5 will use node require() and will solve this problem