anchor.diff:  , pkg-config
   , python3
   , readline
  -, systemd
  +, systemdMinimal
   , udev
   , withExperimental ? false
   }: let
  
positive.code:     python3.pkgs.wrapPython
    ];
  
    outputs = [ "out" "dev" ] ++ lib.optional doCheck "test";
  
    patches = [
      # https://github.com/bluez/bluez/commit/0905a06410d4a5189f0be81e25eb3c3e8a2199c5
  
negative.code: 
    postPatch = ''
      substituteInPlace tools/hid2hci.rules \
        --replace /sbin/udevadm ${systemdMinimal}/bin/udevadm \
        --replace "hid2hci " "$out/lib/udev/hid2hci "
      # Disable some tests:
      # - test-mesh-crypto depends on the following kernel settings:
  