anchor.diff:  
       meta = with stdenv.lib; {
         homepage = "http://w3.impa.br/~diego/software/luasocket/";
  -      hydraPlatforms = with platforms; [darwin linux freebsd illumos];
  +      plaftorms = with platforms; [darwin linux freebsd illumos];
         maintainers = with maintainers; [ mornfall ];
       };
     };
  
positive.code: 
      meta = {
        homepage = "https://github.com/lua-stdlib/lua-stdlib/";
        hydraPlatforms = stdenv.lib.platforms.linux;
        license = stdenv.lib.licenses.mit;
        broken = true;
      };
  
negative.code: 
      meta = {
        homepage = "http://matthewwild.co.uk/projects/luaexpat";
        plaftorms = stdenv.lib.platforms.unix;
        maintainers = [ stdenv.lib.maintainers.flosse ];
      };
    };
  