diff -Naur -x '*.orig' -x '*.rej' -x '*~' syslog-ng-3.29.1/modules/python/pylib/Makefile.am syslog-ng-3.29.1-dont-install-libs-outside-destdir/modules/python/pylib/Makefile.am
--- syslog-ng-3.29.1/modules/python/pylib/Makefile.am	2020-08-28 14:08:43.000000000 +0200
+++ syslog-ng-3.29.1-dont-install-libs-outside-destdir/modules/python/pylib/Makefile.am	2020-11-12 20:20:22.773457517 +0100
@@ -50,7 +50,7 @@
 UNINSTALL_HOOKS += uninstall-pylib
 CLEAN_HOOKS += clean-pylib
 
-PYSETUP_OPTIONS ?= --root="$(PYTHON_ROOT)" --install-lib="$(python_moduledir)"
+PYSETUP_OPTIONS ?= --root="$(PYTHON_ROOT)"
 IS_PYTEST_INSTALLED := $(shell ${PYTHON} -m pytest --version > /dev/null 2>&1 ; echo $$?)
 
 install-pylib: