gentoo-overlay/sys-apps/systemd/files/gentoo-systemd-user-pam.patch

--- a/src/login/systemd-user.m4
+++ b/src/login/systemd-user.m4
@@ -2,11 +2,7 @@
 #
 # Used by systemd --user instances.
 
-account required pam_unix.so
-m4_ifdef(`HAVE_SELINUX',
-session required pam_selinux.so close
-session required pam_selinux.so nottys open
-)m4_dnl
-session required pam_loginuid.so
+account include system-auth
+session include system-auth
 session optional pam_keyinit.so force revoke
 session optional pam_systemd.so