Tue Apr 11 14:33:53 PDT 2017
    The latest on ftp.gnome.org appears to be http://ftp.gnome.org/pub/GNOME/sources/pkg-config/0.19/pkg-config-0.19.tar.bz2 - but
    that's a significantly lower version than what I'd been using.

    I'm not upgrading it this time - at least for now.