anchor.diff:      phytools = [ pkgs.which ];
       PKI = [ pkgs.openssl.dev ];
       png = [ pkgs.libpng.dev ];
  -    proj4 = [ pkgs.proj ];
       protolite = [ pkgs.protobuf ];
       R2SWF = with pkgs; [ zlib libpng freetype.dev ];
       RAppArmor = [ pkgs.libapparmor ];
  
positive.code:         patchShebangs configure
        '';
      });
    };
  in
    self
  
negative.code:     HDF5Array = [ pkgs.zlib.dev ];
      FLAMES = [ pkgs.zlib.dev ];
      ncdfFlow = [ pkgs.zlib.dev ];
      proj4 = [ pkgs.proj.dev ];
    };
  
    packagesRequiringX = [
  