@@ -2,13 +2,14 @@ { pkgs, self }:
 let
   revision = "${self.lastModifiedDate}-${self.shortRev or self.dirtyShortRev or "dirty"}";
   version = self.shortRev or self.dirtyShortRev or "unstable-${self.lastModified}";
+  dockerTag = self.rev or self.dirtyRev or "unstable-${self.lastModified}";
   mkDocker = server:
     let
       PORT = 3000;
     in
     pkgs.dockerTools.streamLayeredImage {
       name = "registry.fly.io/alanpearce-eu";
-      tag = revision;
+      tag = dockerTag;
       contents = [ server ];
       config = {
         Cmd = [ "website" ];

@@ -43,7 +43,9 @@ stream-fly | ${gzip}/bin/gzip --fast | ${skopeo}/bin/skopeo copy docker-archive:/dev/stdin "$@"
   '')
   (writeShellScriptBin "deploy" ''
     set -eu
-    push-to-registry docker://${image}
-    ${pkgs.flyctl}/bin/flyctl deploy
+    TAG=$(git rev-parse HEAD)
+    IMAGE=${image}:$TAG
+    push-to-registry docker://$IMAGE
+    ${pkgs.flyctl}/bin/flyctl deploy --image $IMAGE
   '')
 ]