anchor.diff:  { lib, stdenv, makeWrapper, fetchurl, requireFile, perl, ncurses5, expat, python27, zlib
   , gcc48, gcc49, gcc5, gcc6, gcc7
  -, xorg, gtk2, glib, fontconfig, freetype, unixODBC, alsaLib, glibc
  +, xorg, gtk2, gdk_pixbuf, glib, fontconfig, freetype, unixODBC, alsaLib, glibc
   }:
   
   let
  
positive.code:             nvcc.profile)                  continue;;
              nsight_ee_plugins_manage.sh)   continue;;
              uninstall_cuda_toolkit_6.5.pl) continue;;
              computeprof|nvvp|nsight)       continue;; # TODO: Broken
              *)                             echo "Executing '$f --version':"; ./$f --version;;
            esac
          done
  
negative.code:       '' + lib.optionalString (lib.versionOlder version "8.0") ''
          # Hack to fix building against recent Glibc/GCC.
          echo "NIX_CFLAGS_COMPILE+=' -D_FORCE_INLINES'" >> $out/nix-support/setup-hook
        '' + ''
          runHook postInstall
        '';
  
        postInstall = ''
          for b in nvvp nsight; do
            wrapProgram "$out/bin/$b" \
              --set GDK_PIXBUF_MODULE_FILE "$GDK_PIXBUF_MODULE_FILE"
          done
        '';
  
        preFixup = ''
  