anchor.diff:  , ncurses
   , findXMLCatalogs
   , libiconv
  -, pythonSupport ? enableShared && stdenv.buildPlatform == stdenv.hostPlatform
  +, pythonSupport ? enableShared
   , icuSupport ? false
   , icu
   , enableShared ? stdenv.hostPlatform.libc != "msvcrt" && !stdenv.hostPlatform.isStatic
  
positive.code:     })
    ];
  
    nativeBuildInputs = [
      pkg-config
      autoreconfHook
  
negative.code:     (lib.enableFeature enableStatic "static")
      (lib.enableFeature enableShared "shared")
      (lib.withFeature icuSupport "icu")
      (lib.withFeature pythonSupport "python")
      (lib.optionalString pythonSupport "PYTHON=${python.pythonForBuild.interpreter}")
    ];
  
    installFlags = lib.optionals pythonSupport [
  