anchor.diff:    nativeBuildInputs = [
       bison
       flex
  +    # meson
  +    # ninja
     ];
   
     buildInputs = [
  
positive.code: , fetchurl
  , flex
  , lib
  
  , bzip2
  , glib
  
negative.code:     "--enable-Bsymbolic"
      "--${boolWt doCheck}-cairo"
    ];
  
    # meonFlags = [
    #   "-Ddoctool=false"
    # ];
  
    postInstall = "rm -frv $out/share/gtk-doc";
  
  