Seems that the source issue of this patch is going to be addressed upstream. This should mean that once it's addressed, the original glvnd-fix-gl-dot-pc.patch file can be dropped entirely from the debian/patches/ tree of this package.
References: https://lists.freedesktop.org/archives/mesa-dev/2018-May/196034.html https://lists.freedesktop.org/archives/mesa-dev/2018-May/196038.html Note: Nothing has been accepted upstream yet. May or may not happen before 18.1.1 is released. Will update this bug if I can when this patch is no longer needed. -- Stuart Young (aka Cefiar)