anchor.diff:      maintainers = [ stdenv.lib.maintainers.mrVanDalo ];
       platforms = stdenv.lib.platforms.all;
     };
  -}+}
  
positive.code: { fetchFromGitHub, ack , tree, stdenv, ... }:
  
  stdenv.mkDerivation rec {
  
  
negative.code: 
    installPhase = ''
      mkdir -p $out/{bin,share/man/man1,share/bash-completion/completions}
      substituteInPlace memo \
        --replace "ack "  "${ag}/bin/ag " \
        --replace "tree " "${tree}/bin/tree "
      mv memo $out/bin/
      mv doc/memo.1 $out/share/man/man1/memo.1
      mv completion/memo.bash $out/share/bash-completion/completions/memo.sh
  