build: fix rev logic

jmgilman · jmgilman · commit dd1c4acdf35a · 2022-12-16T13:08:07.000-08:00
diff --git a/nix/jormungandr/containers.nix b/nix/jormungandr/containers.nix
@@ -8,7 +8,7 @@
 
   mkOCI = namespace: let
     rev =
-      if (inputs.self.rev != "not-a-commit")
+      if (inputs.self ? rev)
       then inputs.self.rev
       else "dirty";
   in
diff --git a/nix/vit-servicing-station/containers.nix b/nix/vit-servicing-station/containers.nix
@@ -8,7 +8,7 @@
 
   mkOCI = namespace: let
     rev =
-      if (inputs.self.rev != "not-a-commit")
+      if (inputs.self ? rev)
       then inputs.self.rev
       else "dirty";
   in
