Regression in darwin module

[dudeofawesome]

With the latest commit (eee831a), I'm now getting a near immediate failure to evaluate my expression:

❯ darwin-rebuild switch --flake ~/git/dudeofawesome/nix-config#$hostname --show-trace
warning: Git tree '/Users/dudeofawesome/git/dudeofawesome/nix-config' is dirty
building the system configuration...
warning: Git tree '/Users/dudeofawesome/git/dudeofawesome/nix-config' is dirty
error: builder for '/nix/store/3wb7fbhyk0l31xcg9jbczn6sf2gb7fac-manifest-for-users.json.drv' failed with exit code 1;
       last 1 log lines:
       > /nix/store/yyq0pd7531fsz4iql9n2nld49yk9gak0-sops-install-secrets-0.0.1/bin/sops-install-secrets: failed to parse manifest: json: cannot unmarshal object into Go struct field manifest.templates of type []main.template
       For full logs, run 'nix log /nix/store/3wb7fbhyk0l31xcg9jbczn6sf2gb7fac-manifest-for-users.json.drv'.
error: 1 dependencies of derivation '/nix/store/79l7njcnqmn8gp6p9ckyhmwxzf3az4m8-darwin-system-24.11.20241029.807e915+darwin4.b379bd4.drv' failed to build

Reverting to the prior commit (47fc1d8) fixes it.

[Mic92]

Definitely needs a test. Fixed in #669