gistfile1.sh

$ rebar --version
rebar 2.1.0-pre R15B03 20130620_050022 No VCS info available.

$ which rebar
/usr/local/bin/rebar

$ mix deps.compile cowboy
* Compiling cowboy
==> cowboy (compile)
Dependency not available: ranch-.* ({git,"git://github.com/extend/ranch.git",
                                     "0.8.2"})
** (Mix) could not compile dependency cowboy, /Users/tonini/.mix/rebar command failed.
In case you want to recompile this dependency, please run: mix deps.compile cowboy