Created attachment 375536 [details, diff] Patch for the ebuild Metasploit with USE flag development depends on '=dev-ruby/fivemat-1.2.1' instead of simply 'dev-ruby/fivemat' (which default to '=dev-ruby/fivemat-1.3.0'). It may be needed for test feature too.
Created attachment 375538 [details] Emerge log
Created attachment 375540 [details] Emerge info
Created attachment 375542 [details] Emerge -pqv
Sorry, this was supposed to be fixed upstream before I unmasked development. Fixed.