diff --git a/snapcraft.yaml b/snapcraft.yaml
index 88d5189..1a4fe4d 100644
--- a/snapcraft.yaml
+++ b/snapcraft.yaml
@@ -38,9 +38,11 @@ apps:
 
 parts:
   lightsoff:
+# ext:updatesnap
     source: https://gitlab.gnome.org/GNOME/lightsoff.git
     source-type: git
     source-tag: '40.0.1'
+    source-depth: 1
     parse-info: [usr/share/metainfo/org.gnome.LightsOff.appdata.xml]
     override-build: |
       sed -i.bak -e 's|Icon=org.gnome.LightsOff$|Icon=${SNAP}/meta/gui/org.gnome.LightsOff.svg|g' $CRAFT_PART_SRC/data/org.gnome.LightsOff.desktop.in