anchor.diff:    harfbuzz, fontconfig, pkgconfig, ncurses, imagemagick, xsel,
     libstartup_notification, libGL, libX11, libXrandr, libXinerama, libXcursor,
     libxkbcommon, libXi, libXext, wayland-protocols, wayland,
  +  installShellFiles,
     which, dbus,
     Cocoa,
     CoreGraphics,
  
positive.code:   ] ++ stdenv.lib.optionals stdenv.isDarwin [
      imagemagick
      libicns  # For the png2icns tool.
    ];
  
    propagatedBuildInputs = stdenv.lib.optional stdenv.isLinux libGL;
  
negative.code: 
    buildPhase = if stdenv.isDarwin then ''
      ${python.interpreter} setup.py kitty.app --update-check-interval=0
      make man
    '' else ''
      ${python.interpreter} setup.py linux-package --update-check-interval=0
    '';
  