libffi not found on OSX Yosemite

[motoom]

When I execute grench-0.2.0-mac (placed on the $PATH as executable), I get the following error:

(user@air) ~/bin $ ./grench-0.2.0-mac dyld: Library not loaded: /usr/local/opt/libffi/lib/libffi.6.dylib Referenced from: /Users/user/bin/./grench-0.2.0-mac Reason: image not found Trace/BPT trap: 5