-# remote-fs.target by default, hence explicitly pull /var in here.
-RequiresMountsFor=/var /tmp /var/tmp
+# remote-fs.target by default, hence pull them in explicitly here. Note that we
+# require /var and /var/tmp, but only add a Wants= type dependency on /tmp, as
+# we support that unit being masked, and this should not be considered an error.
+RequiresMountsFor=/var /var/tmp
+Wants=tmp.mount