diff --git a/nixos/modules/update-deployment b/nixos/modules/update-deployment
index 0f9c714e4ce77e65599998dcd61c3986f9781abf..b8956653de6326b66dced745e1cdd60111a9fbbd 100755
--- a/nixos/modules/update-deployment
+++ b/nixos/modules/update-deployment
@@ -24,4 +24,6 @@ else
     git -C "${CHECKOUT}" checkout "${BRANCH}"
 fi
 
+echo "$(date --iso-8601=seconds) $(git -C "${CHECKOUT}" rev-parse HEAD)" >> /var/log/updates.txt
+
 morph deploy "${CHECKOUT}"/morph/grid/"${GRIDNAME}"/grid.nix switch --on "$(hostname)"