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