Public bug reported: Mailman's paths.py.in contains code to add the python site-packages dir to the path. This uses a hardcoded "lib" prefix: # Include Python's site-packages directory. sitedir = os.path.join(sys.prefix, 'lib', 'python'+sys.version[:3], 'site-packages') sys.path.append(sitedir) On 64 bit systems this is usually lib64 and some distros started removing the compatibility symlink lib->lib64 and split up lib and lib64 (e.g. latest Gentoo profiles). So relying on "lib" as a prefix is not compatible any more. Python has a function getsitepackages in the site module and I believe it's best to rely on python knowing best where its directories are. It returns an array, so this would look like this: sitedirs = site.getsitepackages() for sitedir in sitedirs: sys.path.append(sitedir) Patch attached, please apply. ** Affects: mailman Importance: Undecided Status: New ** Attachment added: "fix sitedir path on 64 bit filesystem layouts" https://bugs.launchpad.net/bugs/1838866/+attachment/5280705/+files/mailman-f... -- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/1838866 Title: Mailman 2.1: hardcoded site-packages dir prefix doesn't work on some 64 bit filesystem layouts To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/1838866/+subscriptions