anchor.diff:      install -D -m 644 dot.mkshrc $out/share/mksh/mkshrc
     '';
   
  -  meta = {
  +  meta = with stdenv.lib; {
  +    inherit version;
       description = "MirBSD Korn Shell";
       longDescription = ''
         The MirBSD Korn Shell is a DFSG-free and OSD-compliant (and OSI
  
positive.code:       systems.
      '';
      homepage = "https://www.mirbsd.org/mksh.htm";
      license = stdenv.lib.licenses.free;
      maintainers = [ maintainers.AndersonTorres ];
      platforms = platforms.unix;
    };
  
negative.code: { stdenv, fetchurl, groff }:
  
  let version = "51"; in
  stdenv.mkDerivation {
    name = "mksh-${version}";
  
    src = fetchurl {
      urls = [
        "http://www.mirbsd.org/MirOS/dist/mir/mksh/mksh-R${version}.tgz"
        "http://pub.allbsd.org/MirOS/dist/mir/mksh/mksh-R${version}.tgz"
      ];
      sha256 = "1pyscl3w4aw067a5hb8mczy3z545jz1dwx9n2b09k09xydgsmvlz";
    };
  
    buildInputs = [ groff ];
  