anchor.diff:    selfApplySetupHook = true;
   
     postPatch = ''
  +    grep -q '#!/usr/bin/env python' gio/tests/gengiotypefuncs.py
       sed -i gio/tests/gengiotypefuncs.py \
         -e 's,#!/usr/bin/env python.*,#!${python3.interpreter},'
     '';
  
positive.code:   src = fetchurl {
      url = "mirror://gnome/sources/glib/${channel}/${name}.tar.xz";
      hashOutput = false;
      sha256 = "97d6a9d926b6aa3dfaadad3077cfb43eec74432ab455dff14250c769d526d7d6";
    };
  
    nativeBuildInputs = [
  
negative.code:       ! find "$out" -name "$i"
        install -D -m 644 -v m4macros/"$i" "$out"/share/aclocal/"$i"
      done
    '';
  
    passthru = {
  