anchor.diff:    src = fetchzip {
       version = 3;
       url = "https://github.com/mpv-player/mpv/archive/v${version}.tar.gz";
  -    sha256 = "0d8eebc876f55ee7f72ed49cf2a1dc72604bffb205ad78eb54514da2051f4ca0";
  +    sha256 = "33ecc720192645c148036487a6f97b2124ecf1c750caa3f99b90f91092a24bcb";
     };
   
     nativeBuildInputs = [
  
positive.code:     #"--${boolEn (vapoursynth != null)}-vapoursynth"
      #"--${boolEn (vapoursynth != null)}-vapoursynth-lazy"
      #"--${boolEn (vapoursynth != null)}-vapoursynth-core"
      "--${boolEn (libarchive != null)}-libarchive"
      "--${boolEn (ffmpeg != null)}-libavdevice"
      "--${boolEn (sdl != null)}-sdl2"
  
negative.code:     "--${boolEn opengl-dummy.egl}-vaapi-x-egl"
      "--${boolEn (libcaca != null)}-caca"
      "--${boolEn (libjpeg != null)}-jpeg"
      "--disable-direct3d"  # Windows
      "--disable-android"  # Android
      # FIXME: add raspberry pi support
      "--disable-rpi"
      "--disable-ios-gl"  # iOS
      "--disable-plain-gl"
      "--disable-mali-fbdev"
      "--${boolEn (opengl-dummy != null)}-gl"
      ###"--${boolEn (vulkan-headers != null)}-vulkan"
      /**/###"--disable-shaderc"
      "--${boolEn (libva != null)}-vaapi-hwaccel"
      "--disable-videotoolbox-hwaccel-new"  # macOS
      "--disable-videotoolbox-hwaccel-old"  # macOS
      ###"--disable-videotoolbox-hwaccel"  # macOS
      "--disable-videotoolbox-gl"  # macOS
      "--${boolEn (libvdpau != null && ffmpeg != null)}-vdpau-hwaccel"
      "--disable-d3d-hwaccel"  # Windows
      "--disable-d3d9-hwaccel"  # Windows
      "--disable-gl-dxinterop-d3d9"  # Windows
      "--${boolEn (
        ffmpeg != null
        && ffmpeg.features.cuda
        && nvidia-cuda-toolkit != null
        && nvidia-drivers != null)}-cuda-hwaccel"
      "--enable-tv"
      # FIXME
      # "--${boolEn (v4l_lib != null)}-tv-v4l2"
      # "--${boolEn (v4l_lib != null)}-libv4l2"
  