fix(nixos): build vendored pi independently

src/dotfiles/registry/validation.nix

@@ -3,7 +3,17 @@
   lib,
 }:
 let
-  # NOLINT(single_use_binding)
+  assertValid =
+    data:
+    let
+      assertions = validationAssertions data;
+      failures = lib.filter (assertion: !assertion.assertion) assertions;
+    in
+    assert lib.assertMsg (lib.all (assertion: assertion.assertion) assertions) (
+      lib.concatMapStringsSep "\n" (assertion: assertion.message) failures
+    );
+    data;
+
   validationAssertions =
     data:
     lib.concatLists (
@@ -19,7 +29,6 @@ let
       ) definitions
     );
 
-  # NOLINT(single_use_binding)
   flattenRegistryEntries =
     registryName: data:
     lib.concatLists (
@@ -32,13 +41,4 @@ let
       ) data
     );
 in
-data:
-let
-  assertions = validationAssertions data;
-in
-assert lib.assertMsg (lib.all (assertion: assertion.assertion) assertions) (
-  lib.concatMapStringsSep "\n" (assertion: assertion.message) (
-    lib.filter (assertion: !assertion.assertion) assertions
-  )
-);
-data
+assertValid