diff --git a/flake.nix b/flake.nix
index 3ef1fe92..75cf973b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -88,6 +88,10 @@
 
           # Add entry to build a docker image with headscale
           # caveat: only works on Linux
+          #
+          # Usage:
+          # nix build .#headscale-docker
+          # docker load < result
           headscale-docker = pkgs.dockerTools.buildLayeredImage {
             name = "headscale";
             tag = "latest";