From 14f83d5c6f98a93b7cce1d0a90b24aa9908ea57e Mon Sep 17 00:00:00 2001
From: Franz Pletz <fpletz@fnordicwalking.de>
Date: Tue, 23 Jan 2024 07:16:59 +0100
Subject: [PATCH] compressFirmwareXz: fix links to directories

Only add the `.xz` suffix to links if link target is a regular file.
This breaks if the target is a directory.

Fixes #283005.
---
 pkgs/build-support/kernel/compress-firmware-xz.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/build-support/kernel/compress-firmware-xz.nix b/pkgs/build-support/kernel/compress-firmware-xz.nix
index cfb06a5c0f15..a69b31bb3bd0 100644
--- a/pkgs/build-support/kernel/compress-firmware-xz.nix
+++ b/pkgs/build-support/kernel/compress-firmware-xz.nix
@@ -15,6 +15,10 @@ runCommand "${firmware.name}-xz" args ''
           sh -c 'xz -9c -T1 -C crc32 --lzma2=dict=2MiB "${firmware}/$1" > "$1.xz"' --)
   (cd ${firmware} && find lib/firmware -type l) | while read link; do
       target="$(readlink "${firmware}/$link")"
-      ln -vs -- "''${target/^${firmware}/$out}.xz" "$out/$link.xz"
+      if [ -f $target ]; then
+        ln -vs -- "''${target/^${firmware}/$out}.xz" "$out/$link.xz"
+      else
+        ln -vs -- "''${target/^${firmware}/$out}" "$out/$link"
+      fi
   done
 ''