anchor.diff:      };
     };
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       description = "C++ interface for GTK+";
       homepage = http://gtkmm.org/;
       license = licenses.lgpl2Plus;
  
positive.code: }:
  
  let
    inherit (stdenv.lib)
      boolEn;
  
    source = (import ./sources.nix { })."${channel}";
  
negative.code: { stdenv
  , fetchurl
  , lib
  
  , atkmm
  , cairomm
  