From 2ebf6c55e6b3e42e152510b541a3463b3cbb6870 Mon Sep 17 00:00:00 2001
From: Stefan Frijters <sfrijters@gmail.com>
Date: Sat, 30 May 2026 18:21:02 +0200
Subject: [PATCH] libkrunfw: fix build with structuredAttrs, use --replace-fail

---
 pkgs/by-name/li/libkrunfw/package.nix | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/pkgs/by-name/li/libkrunfw/package.nix b/pkgs/by-name/li/libkrunfw/package.nix
index 73120ed22c99..aa5c19c4a513 100644
--- a/pkgs/by-name/li/libkrunfw/package.nix
+++ b/pkgs/by-name/li/libkrunfw/package.nix
@@ -19,6 +19,12 @@ assert lib.elem variant [
   "tdx"
 ];
 
+let
+  kernelSrc = fetchurl {
+    url = "mirror://kernel/linux/kernel/v6.x/linux-6.12.76.tar.xz";
+    hash = "sha256-u7Q+g0xG5r1JpcKPIuZ5qTdENATh9lMgTUskkp862JY=";
+  };
+in
 stdenv.mkDerivation (finalAttrs: {
   pname = "libkrunfw" + lib.optionalString (variant != null) "-${variant}";
   version = "5.3.0";
@@ -30,14 +36,9 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-fhG/bP1HzmhyU2N+wnr1074WEGsD9RdTUUBhYUFpWlA=";
   };
 
-  kernelSrc = fetchurl {
-    url = "mirror://kernel/linux/kernel/v6.x/linux-6.12.76.tar.xz";
-    hash = "sha256-u7Q+g0xG5r1JpcKPIuZ5qTdENATh9lMgTUskkp862JY=";
-  };
-
   postPatch = ''
     substituteInPlace Makefile \
-      --replace 'curl $(KERNEL_REMOTE) -o $(KERNEL_TARBALL)' 'ln -s $(kernelSrc) $(KERNEL_TARBALL)'
+      --replace-fail 'curl $(KERNEL_REMOTE) -o $(KERNEL_TARBALL)' 'ln -s ${kernelSrc} $(KERNEL_TARBALL)'
   '';
 
   nativeBuildInputs = [