anchor.diff:  { stdenv
   , makeWrapper
   , fetchurl
  +, lib
   
   , curl
   , imlib2
   , libexif
   , libjpeg
   , libpng
  -, xorg
  +, libx11
  +, libxinerama
  +, libxt
  +, xproto
   }:
   
   stdenv.mkDerivation rec {
  
positive.code:     imlib2
      libexif
      libpng
      xorg.libX11
      xorg.libXinerama
      xorg.libXt
      xorg.xproto
    ];
  
    preBuild = ''
  
negative.code:     };
    };
  
    meta = with lib; {
      description = "A light-weight image viewer";
      homepage = https://feh.finalrewind.org/;
      license = licenses.mit;
  