Modern homebrew links cellarin /usr/local/opt too

required for git

Author: sandercox

brew-pkg.rb

@@ -85,6 +85,8 @@ def pkg
 
           safe_system "mkdir", "-p", "#{staging_root}/Cellar/#{formula.name}/"
           safe_system "rsync", "-a", "#{HOMEBREW_CELLAR}/#{formula.name}/#{dep_version}", "#{staging_root}/Cellar/#{formula.name}/"
+          safe_system "mkdir", "-p", "#{staging_root}/opt"
+          safe_system "ln", "-s", "../Cellar/#{formula.name}/#{dep_version}", "#{staging_root}/opt/#{formula.name}"
         end
 
       end