anchor.diff:      # enable dummy Demo Instrument (only if code is available)
       USE_DEMOINST = true ;
   
  +    # enable Video Test Patch Generator and 3DLUT device support
  +    # (V2.0.0 and above)
  +    USE_VTPGLUT = false ;
  +
  +    # enable Printer device support
  +    USE_PRINTER = false ;
  +
  +    # enable CMF Measurement device and accessory support (if present)
  +    USE_CMFM = false ;
  +
       # Use ArgyllCMS version of libusb (deprecated - don't use)
       USE_LIBUSB = false ;
   
  -    # For testing CCast
  -    DEFINES += CCTEST_PATTERN ;
  +    # Compile in graph plotting code (Not fully implemented)
  +    USE_PLOT = true ;		# [true]
   
       JPEGLIB = ;
       JPEGINC = ;
  
positive.code:   # in that file is reflected here.
    jamTop = writeText "argyllcms_jamtop" ''
      DESTDIR = "/" ;
      REFSUBDIR = "ref" ;
  
      # Keep this DESTDIR anchored to Jamtop. PREFIX is used literally
      ANCHORED_PATH_VARS = DESTDIR ;
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "argyllcms";
    version = "2.2.1";
  
    src = fetchzip {
      # Kind of flacky URL, it was reaturning 406 and inconsistent binaries for a
      # while on me. It might be good to find a mirror
      url = "https://www.argyllcms.com/Argyll_V${version}_src.zip";
      sha256 = "sha256-umY3wQfG26Okqnw+MCUnlwWTAyJ6MR/FHe5oe61KBh0=";
    };
  
    # The contents of this file comes from the Jamtop file from the
    # root of the ArgyllCMS distribution, rewritten to pick up Nixpkgs
  