anchor.diff:  , gettext
   , meson
   , ninja
  -, python3
   
   , elfutils
   , libffi
   , libselinux
   , pcre
  +, python3
   , util-linux_lib
   , zlib
   }:
  
positive.code:     grep -q '#!/usr/bin/env python' gio/tests/gengiotypefuncs.py
      sed -i gio/tests/gengiotypefuncs.py \
        -e 's,#!/usr/bin/env python.*,#!${python3.interpreter},'
    '';
  
    postInstall = ''
  
negative.code:     # M4 macros are not installed by meson, but still needed by other
      # packages during the meson transition.
      for i in 'glib-2.0.m4' 'glib-gettext.m4' 'gsettings.m4'; do
        install -D -m 644 -v m4macros/"$i" "$out"/share/aclocal/"$i"
      done
    '';
  