debian/rules

@@ -181,7 +181,7 @@ override_dh_installchangelogs:
 override_dh_installinit:
 ifneq (,$(filter samba, $(shell dh_listpackages)))
 	dh_installinit -psamba --name smbd
-	dh_installinit -psamba --name nmbd
+	dh_installinit -psamba --name nmbd --error-handler nmbd_error_handler
 	dh_installinit -psamba --name samba-ad-dc
 endif
 ifneq (,$(filter winbind, $(shell dh_listpackages)))

debian/samba.postinst

@@ -2,6 +2,17 @@
 
 set -e
 
+nmbd_error_handler() {
+    if [ -d /sys/class/net/lo ] && ls /sys/class/net/lo | grep -qv ^lo$; then
+        # https://bugs.debian.org/893762
+        echo 'WARNING: nmbd failed to start as there is no non-loopback interface.'
+        echo 'Either add an interface or set "disable netbios = yes" in smb.conf and run "systemctl mask nmbd"'
+        return 0
+    else
+        return 1 # caught by set -e
+    fi
+}
+
 mask_services() {
     local reason="$1"
     shift

debian/source/lintian-overrides

-# winbind talks over a unix domain socket, so non-arch specific dependencies are fine.
-samba source: dependency-is-not-multi-archified libnss-winbind depends on winbind (multi-arch: no)
-samba source: dependency-is-not-multi-archified libpam-winbind depends on winbind (multi-arch: no)