From 03b9d66f3ded35fb697b53bc4a5d06b2366acdc1 Mon Sep 17 00:00:00 2001
From: zimbatm <zimbatm@zimbatm.com>
Date: Mon, 6 Apr 2026 13:21:53 +0200
Subject: [PATCH] lib.systems.equals: use lib imports instead of builtins

Use lib.filter and lib.attrNames instead of builtins.* directly,
consistent with the rest of the file's style.

Follow-up to #506588, incorporating review feedback from #507232.
---
 lib/systems/default.nix | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/systems/default.nix b/lib/systems/default.nix
index bc1efee548bb..eb06f12f25a0 100644
--- a/lib/systems/default.nix
+++ b/lib/systems/default.nix
@@ -3,11 +3,11 @@
 let
   inherit (lib)
     any
-    filterAttrs
+    attrNames
+    filter
     foldl
     hasInfix
     isAttrs
-    isFunction
     isList
     mapAttrs
     optional
@@ -43,9 +43,8 @@ let
   */
   equals =
     let
-      # perf: avoid lib.isFunction because system attrs are never __functor-style attrsets.
-      removeFunctions =
-        a: removeAttrs a (builtins.filter (n: builtins.isFunction a.${n}) (builtins.attrNames a));
+      # System attrs are never __functor-style attrsets, so builtins.isFunction suffices.
+      removeFunctions = a: removeAttrs a (filter (n: builtins.isFunction a.${n}) (attrNames a));
     in
     a: b: removeFunctions a == removeFunctions b;