Error: undefined method 'mkdir_p' ...

[mholt]

Doing a routine install of nginx with Homebrew on Mac OS X 10.8 and getting this error:

==> Installing nginx dependency: pcre
==> Downloading ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.32.
######################################################################## 100.0%
######################################################################## 100.0%==> ./configure --prefix=/usr/local/Cellar/pcre/8.32 --enable-utf8 --enable-unic
==> make test
==> make install
  /usr/local/Cellar/pcre/8.32: 135 files, 3.6M, built in 42 seconds
==> Installing nginx
==> Downloading http://nginx.org/download/nginx-1.2.8.tar.gz
######################################################################## 100.0%
==> Patching
patching file conf/nginx.conf
==> ./configure --prefix=/usr/local/Cellar/nginx/1.2.8 --with-http_ssl_module --
==> make
==> make install
Error: undefined method `mkdir_p' for #<Pathname:/usr/local/var>

Please report this bug:
    https://github.com/mxcl/homebrew/wiki/troubleshooting

However, ran "brew doctor" ... and re-installed again, and it magically worked. (Brew doctor showed no output except "raring to brew")

[jacknagel]

It's f5543c3; there is no mkdir_p method on Pathname, should be mkpath.