Fixes <https://bugs.gnu.org/32170>. * gnu/packages/patches/python-cairocffi-dlopen-path.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/python.scm (python-cairocffi)[inputs]: Add glib, gtk+, pango. [native-inputs]: Add python-pytest. [arguments]: Enable tests. [arguments]<#:phases>[patch-paths]: New phase.