anchor.diff:  
     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
     '';
  
positive.code:   harfbuzz, fontconfig, pkgconfig, ncurses, imagemagick, xsel,
    libstartup_notification, libGL, libX11, libXrandr, libXinerama, libXcursor,
    libxkbcommon, libXi, libXext, wayland-protocols, wayland,
    which, dbus,
    Cocoa,
    CoreGraphics,
  
negative.code:     ln -s ../Applications/kitty.app/Contents/MacOS/kitty "$out/bin/kitty"
      mkdir "$out/Applications"
      cp -r kitty.app "$out/Applications/kitty.app"
  
      installManPage 'docs/_build/man/kitty.1'
      '' else ''
      cp -r linux-package/{bin,share,lib} $out
      ''}
  