home brewを入れようとしたら404

Mac 
% ruby -e "$(curl -fsSL https://gist.github.com/raw/323731/install_homebrew.rb)"
curl: (22) The requested URL returned error: 404

a

% /usr/bin/ruby -e "$(/usr/bin/curl -fsSL https://raw.github.com/mxcl/homebrew/master/Library/Contributions/install_homebrew.rb)"
==> This script will install:
/usr/local/bin/brew
/usr/local/Library/Formula/...
/usr/local/Library/Homebrew/...

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