Cannot install mcrypt via homebrew OSX Yosemite

Question

Running OSX 10.10.1. I installed homebrew, and then tried running the following command:

brew install mcrypt

After which, it went through a long process of downloading/installing files. It then gave me an error:

checking for mhash_keygen in -lmhash... no
configure: error: "You need at least libmhash 0.8.15 to compile this program.     
http://mhash.sf.net/"

Running php -v in terminal:

PHP 5.6.2 (cli) (built: Nov  2 2014 09:34:41) 
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2014 Zend Technologies
with Zend OPcache v7.0.4-dev, Copyright (c) 1999-2014, by Zend Technologies
with Xdebug v2.2.5, Copyright (c) 2002-2014, by Derick Rethans

Any help is appreciated. Everything seems to be breaking in OSX Yosemite...

Answer 1

I was experiencing the same issue and uninstalling / reinstalling mhash resolved the issue:

brew uninstall mhash

brew install mhash

After I did this I was able to properly install mcrypt.