anchor.diff:  { stdenv, fetchurl, pkgconfig, cups, poppler, poppler_utils, fontconfig
   , libjpeg, libpng, perl, ijs, qpdf, dbus, substituteAll, bash, avahi
  -, makeWrapper, coreutils, gnused, bc, gawk, gnugrep, which
  +, makeWrapper, coreutils, gnused, bc, gawk, gnugrep, which, ghostscript
  +, mupdf
   }:
   
   let
  
positive.code: 
        # Ensure that gstoraster can find gs in $PATH.
        substituteInPlace filter/gstoraster.c --replace execve execvpe
      '';
  
    postInstall =
  
negative.code:     description = "Backends, filters, and other software that was once part of the core CUPS distribution but is no longer maintained by Apple Inc";
      license = stdenv.lib.licenses.gpl2;
      platforms = stdenv.lib.platforms.linux;
      maintainers = with stdenv.lib.maintainers; [ layus ];
    };
  }
  