anchor.diff:      /**/"--disable-opencl"
       # OpenGL requires libX11 for GLX
       "--${boolEn (mesa_noglu != null && xorg.libX11 != null)}-opengl"
  -    "--${boolEn opensslExtlib}-openssl"
  +    "--${boolEn (openssl != null)}-openssl"
       #(fflag "--${boolEn (schannel != null)}-schannel" "3.0")
       /**/(fflag "--disable-schannel" "3.0")
       (deprfflag "--${boolEn (SDL != null)}-sdl" null "3.1")
  
positive.code:     # Undocumented
      (deprfflag "--${boolEn (dcadec != null)}-libdcadec" null "3.0")
      (fflag "--${boolEn (libebur128 != null)}-libebur128" "3.1")
      (deprfflag "--${boolEn faacExtlib}-libfaac" null "3.1")
      (fflag "--${boolEn fdkaacExtlib}-libfdk-aac" null)
      (fflag "--${boolEn (fontconfig != null)}-libfontconfig" "3.1")
      #"--${boolEn (flite != null)}-libflite"
      /**/"--disable-libflite"
  
negative.code:   samba_client != null
    #|| vo-aacenc != null
    #|| vo-amrwbenc != null
    -> version3Licensing && gplLicensing;
  # Non-free
  assert
    fdk_aac != null
    #|| libnpp != null
    || nvidia-cuda-toolkit != null
    || nvidia-video-codec-sdk != null
    || openssl != null
    -> nonfreeLicensing && gplLicensing && version3Licensing;
  /*
   *  Build dependencies
   */
  assert networkBuild -> gnutls != null || openssl != null;
  assert pixelutilsBuild -> avutilLibrary;
  /*
   *  Program dependencies
  