anchor.diff:    nativeBuildInputs = [
       bison
       flex
  +    makeWrapper
       python
     ];
   
  
positive.code:     # that doesn't exist
      grep -q '\-lgfchangedb' $out/lib/pkgconfig/libgfdb.pc
      sed -i 's, -lgfchangedb,,g' $out/lib/pkgconfig/libgfdb.pc
    '';
  
    meta = with stdenv.lib; {
  
negative.code: , readline
  , sqlite
  , util-linux_lib
  , which
  , zlib
  }:
  
  let
    inherit (stdenv.lib)
      concatStringsSep;
  
    mountPath = [
      attr
      coreutils
      gawk
      gnugrep
      gnused
      which
    ];
  
    versionMajor = "3.9";
    versionMinor = "0";
    version = "${versionMajor}.${versionMinor}";
  