anchor.diff:  
     name = "memo-${version}";
   
  -  version = "0.5";
  +  version = "0.6";
   
     src = fetchFromGitHub {
       owner  = "mrVanDalo";
       repo   = "memo";
       rev    = "${version}";
  -    sha256 = "1kq8hmq4lgvkk717nhmdryr90g61xm0jm7y8dzya8jsxsn531gm8";
  +    sha256 = "1cvjs36f6vxzfz5d63yhyw8j7gdw5hn6cfzccf7ag08lamjhfhbr";
     };
   
     installPhase = let
  
positive.code:       --replace "ack_cmd=ack"       "ack_cmd=${silver-searcher}/bin/ag" \
        --replace "tree_cmd=tree"     "tree_cmd=${tree}/bin/tree" \
        --replace "man_cmd=man"       "man_cmd=${man}/bin/man" \
        --replace "pandoc_cmd=pandoc" "${pandocReplacement}"
      mv memo $out/bin/
      mv doc/memo.1 $out/share/man/man1/memo.1
  
negative.code: { fetchFromGitHub, silver-searcher, tree, man, stdenv,
    git,
    pandocSupport ? true, pandoc ? null
    , ... }:
  
  