Use new colmena option so it can handle a dirty flake

Justfile

@@ -29,8 +29,8 @@ fmt:
     nix fmt
 
 deploy host:
-    colmena apply --on {{host}}
+    colmena apply --on {{host}} --experimental-flake-eval
 
 [confirm]
 cold-deploy host:
-    colmena apply --on {{host}} --reboot
+    colmena apply --on {{host}} --reboot --experimental-flake-eval

flake.nix

@@ -171,6 +171,8 @@
           }) (builtins.attrNames machines)
         );
 
+        colmenaHive = inputs.colmena.lib.makeHive self.outputs.colmena;
+
         colmena =
           {
             meta = {