diff --git a/templates/nixos/flake.lock b/templates/nixos/flake.lock
index be248c6..1f14870 100644
--- a/templates/nixos/flake.lock
+++ b/templates/nixos/flake.lock
@@ -168,11 +168,11 @@
         "flops": "flops"
       },
       "locked": {
-        "lastModified": 1699615932,
-        "narHash": "sha256-OROMP9jp+dVFF+EmV5W9OJlK8MszhhdLxqlj7U4SlFI=",
+        "lastModified": 1699697584,
+        "narHash": "sha256-NnT6WKmhoQ1kjtuagLeOY3KEwkwQE1WmpWVzEE5KQos=",
         "owner": "gtrunsec",
         "repo": "omnibus",
-        "rev": "4d7a84758f586f8ca4e6c80676fa3ef427c1a34a",
+        "rev": "644636d7a98b3e73be7cc2907c30862d77be351e",
         "type": "github"
       },
       "original": {
diff --git a/tests/_snapshots/loaders b/tests/_snapshots/loaders
new file mode 100644
index 0000000..3bfb529
--- /dev/null
+++ b/tests/_snapshots/loaders
@@ -0,0 +1,2 @@
+#json
+{"lua":{"x":"/nix/store/58jsfiycgk0k9qxlc69ywjd1mwad7szm-x.lua","y":"/nix/store/wmkr8p843pwbiwvfm2l7l2cwznx6jyc6-y.lua"}}
\ No newline at end of file
diff --git a/tests/loaders/__fixture/x.lua b/tests/loaders/__fixture/x.lua
new file mode 100644
index 0000000..399ce99
--- /dev/null
+++ b/tests/loaders/__fixture/x.lua
@@ -0,0 +1 @@
+print("x")
diff --git a/tests/loaders/__fixture/y.lua b/tests/loaders/__fixture/y.lua
new file mode 100644
index 0000000..0abc824
--- /dev/null
+++ b/tests/loaders/__fixture/y.lua
@@ -0,0 +1 @@
+print("y")
diff --git a/tests/loaders/expr.nix b/tests/loaders/expr.nix
new file mode 100644
index 0000000..abc1a5c
--- /dev/null
+++ b/tests/loaders/expr.nix
@@ -0,0 +1,21 @@
+{
+  omnibus,
+  lib,
+  haumea,
+}:
+let
+  inherit (omnibus) load;
+in
+{
+  lua = lib.mapAttrs (_: builtins.unsafeDiscardStringContext) (
+    load {
+      src = ./__fixture;
+      loader = with haumea; [
+        (matchers.regex "^(.+)\\.(lua)$" (
+          _: _: path:
+          path
+        ))
+      ];
+    }
+  );
+}