brew --config

HOMEBREW_VERSION: 0.9.4
ORIGIN: https://github.com/mxcl/homebrew
HEAD: 72ee11d988eff7e4af82eec813381f3f82950b08
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
CPU: 8-core 64-bit ivybridge
OS X: 10.8.4-x86_64
Xcode: 4.6.3
CLT: 4.6.0.0.1.1365549073
LLVM-GCC: build 2336
Clang: 4.2 build 425
X11: N/A
System Ruby: 1.8.7-358
Perl: /usr/bin/perl
Python: /usr/local/bin/python => /usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/bin/python2.7
Ruby: /Users/giacecco/.rbenv/shims/ruby

brew doctor

~$ brew doctor
Your system is ready to brew.

brew install -vd --tbb opencv 2>&1

/usr/local/Library/brew.rb: loading /usr/local/Library/Formula/opencv.rb
Error: no such file to load -- /usr/local/Library/Formula/opencv.rb
Please report this bug:
    https://github.com/mxcl/homebrew/wiki/troubleshooting
/usr/local/Library/Homebrew/formulary.rb:40:in `require'
/usr/local/Library/Homebrew/formulary.rb:40:in `klass'
/usr/local/Library/Homebrew/formulary.rb:90:in `get_formula'
/usr/local/Library/Homebrew/formulary.rb:175:in `factory'
/usr/local/Library/Homebrew/formula.rb:410:in `factory'
/usr/local/Library/Homebrew/extend/ARGV.rb:12:in `formulae'
/usr/local/Library/Homebrew/extend/ARGV.rb:12:in `map'
/usr/local/Library/Homebrew/extend/ARGV.rb:12:in `formulae'
/usr/local/Library/Homebrew/cmd/install.rb:22:in `install'
/usr/local/Library/brew.rb:95:in `send'
/usr/local/Library/brew.rb:95