diff --git a/images/fedora-cosmic/custom.yaml b/images/fedora-cosmic/custom.yaml
index bdc88f4..21c2825 100644
--- a/images/fedora-cosmic/custom.yaml
+++ b/images/fedora-cosmic/custom.yaml
@@ -79,7 +79,7 @@ postprocess:
         /etc/authselect/custom/kanidm/password-auth
       install -m 0644 /usr/share/fedora-cosmic/authselect/nsswitch.conf \
         /etc/authselect/custom/kanidm/nsswitch.conf
-      authselect select custom/kanidm --force
+      authselect select custom/kanidm --force --nobackup
     ); then
       echo "authselect setup failed, installing PAM/nsswitch directly" >&2
       rm -f /etc/pam.d/system-auth /etc/pam.d/password-auth /etc/nsswitch.conf