Hi, This looks like #870304 [0] but now the path change of gtkglext-config.h was reversed, invalidating debian/patches/gtkglext-patch.patch. See gtkglext changelog [1].
Best regards, Juhani [0] https://bugs.debian.org/870304 [1] http://metadata.ftp-master.debian.org/changelogs/main/g/gtkglext/gtkglext_1.2.0-9_changelog
