diff --git a/nixosModules/clanCore/flake-module.nix b/nixosModules/clanCore/flake-module.nix
index ddac88f18..4d6dbe2e0 100644
--- a/nixosModules/clanCore/flake-module.nix
+++ b/nixosModules/clanCore/flake-module.nix
@@ -33,7 +33,7 @@
         '';
       };
       clanIcon = lib.mkOption {
-        type = lib.types.path;
+        type = lib.types.nullOr lib.types.path;
         description = ''
           the location of the clan icon
         '';
diff --git a/pkgs/clan-cli/clan_cli/nix.py b/pkgs/clan-cli/clan_cli/nix.py
index 3a7aca7ee..ae47a4f48 100644
--- a/pkgs/clan-cli/clan_cli/nix.py
+++ b/pkgs/clan-cli/clan_cli/nix.py
@@ -82,6 +82,7 @@ def nix_eval(flags: list[str]) -> list[str]:
     return default_flags + flags
 
 
+@deal.raises(ClanError)
 def nix_metadata(flake: str) -> dict[str, Any]:
     cmd = nix_command(["flake", "metadata", "--json", flake])
     proc = subprocess.run(cmd, check=True, text=True, stdout=subprocess.PIPE)