Brew link autoconf » undefined method `cleanpath’

Voor het installeren van PHP Xdebug via Homebrew moest ik Autoconf linken via Homebrew. Helaas resulteerde dit in de volgende foutmelding: $ brew link autoconf Linking /usr/local/Cellar/autoconf/2.69… /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/pathname.rb:486:in `relative_path_from’: undefined method `cleanpath’ for #<Keg:/usr/local/Cellar/autoconf/2.69> (NoMethodError)     from /usr/local/Library/Homebrew/keg.rb:40:in `to_s’     from /usr/local/Library/brew.rb:161:in `message’     from /usr/local/Library/brew.rb:161:in `rescue in <main>’     from /usr/local/Library/brew.rb:66:in `<main>’ Meestal zijn […]