anchor.diff:      gdb man
     ];
   
  -  installTargets = "install install-man";
  +  installTargets = [ "install" "install-man" ];
   
     dontGzipMan = true; # already compressed
   
  
positive.code: 
    src = fetchurl {
      url = "https://notmuchmail.org/releases/${name}.tar.gz";
      sha256 = "1v0ff6qqwj42p3n6qw30czzqi52nvgf3dn05vd7a03g39a5js8af";
    };
  
    nativeBuildInputs = [ pkgconfig ];
  
negative.code:       --replace '-install_name $(libdir)' "-install_name $out/lib"
    '';
  
    configureFlags = [ "--zshcompletiondir=${placeholder "out"}/share/zsh/site-functions" ];
  
    # Notmuch doesn't use autoconf and consequently doesn't tag --bindir and
    # friends
    setOutputFlags = false;
    enableParallelBuilding = true;
    makeFlags = [ "V=1" ];
  
    preCheck = let
      test-database = fetchurl {
  