anchor.diff:      "--${boolEn (xz != null)}-lzma"
       #"--${boolEn decklinkExtlib}-decklink"
       /**/"--disable-decklink"
  +    /**/(fflag "--disable-libndi_newtek" "3.4")
       "--disable-mediacodec"  # android
       (fflag "--${boolEn (libmysofa != null)}-libmysofa" "3.4")
  -    (deprfflag null "3.4" "--disable-netcdf")
  +    (deprfflag null "3.3" "--disable-netcdf")
       "--${boolEn (openal != null)}-openal"
       #"--${boolEn (opencl != null)}-opencl"
       /**/"--disable-opencl"
       "--${boolEn (opengl-dummy != null && opengl-dummy.glx)}-opengl"
       "--${boolEn (openssl != null)}-openssl"
  -    "--disable-schannel"  # windows
  +    /**/(fflag "--disable-sndio" "3.4")
  +    "--disable-schannel"  # Windows
       "--${boolEn (sdl != null)}-sdl"
       "--${boolEn (sdl != null)}-sdl2"
       "--disable-securetransport"
  
positive.code:   nativeBuildInputs = [
      perl
      texinfo
      yasm
    ];
  
    buildInputs = [
  
negative.code:     "--${boolEn (kvazaar != null)}-libkvazaar"
      "--${boolEn (libmodplug != null)}-libmodplug"
      "--${boolEn (lame != null)}-libmp3lame"
      (deprfflag null "3.3" "--disable-libnut")
      #"--${boolEn (opencore-amr != null)}-libopencore-amrnb"
      /**/"--disable-libopencore-amrnb"
      #"--${boolEn (opencore-amr != null)}-libopencore-amrwb"
  