From bd107d4d8fefaf7c96773742524db27ea4da34c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Thu, 30 Oct 2025 21:28:21 +0100
Subject: [PATCH] prefer-remote-fetch: fix fetchurl eval

---
 pkgs/build-support/prefer-remote-fetch/default.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/build-support/prefer-remote-fetch/default.nix b/pkgs/build-support/prefer-remote-fetch/default.nix
index 47b633da8faf..d686533f69e0 100644
--- a/pkgs/build-support/prefer-remote-fetch/default.nix
+++ b/pkgs/build-support/prefer-remote-fetch/default.nix
@@ -22,6 +22,12 @@ self: super: {
   fetchrepoproject = args: super.fetchrepoproject ({ preferLocalBuild = false; } // args);
   fetchs3 = args: super.fetchs3 ({ preferLocalBuild = false; } // args);
   fetchsvn = args: super.fetchsvn ({ preferLocalBuild = false; } // args);
-  fetchurl = args: super.fetchurl ({ preferLocalBuild = false; } // args);
+  fetchurl =
+    fpArgs:
+    super.fetchurl (
+      super.lib.extends (finalAttrs: args: { preferLocalBuild = args.preferLocalBuild or false; }) (
+        super.lib.toFunction fpArgs
+      )
+    );
   mkNugetSource = args: super.mkNugetSource ({ preferLocalBuild = false; } // args);
 }