Obvious/phantomjs — pull request #91 by jgable (2013-08-19 16:30:32+00:00)
Title: Explicitly set mode of tmp/phantomjs directory

Some operating systems (like CentOS) default umask will not allow writing to a directory created by Node with the default 777 mask.

If you don't think you want to put this here, I can perhaps see if the mkdirp project will add it there.