From 10e1a6b53980144d1787cf7100aa53e05b1729da Mon Sep 17 00:00:00 2001
From: Mikael Voss <mvs@nyantec.com>
Date: Fri, 25 Jul 2025 14:37:04 +0200
Subject: [PATCH] alsa-utils: provide precise licence information

Most of the code is licenced under GPL 2 or later, with the following
exceptions:

- alsactl is mostly GPL 2+ with init_parse.c, init_sysdeps.c,
  init_sysdeps.c, init_utils_run.c and init_utils_string.c being marked
  as GPL 2 only, and
- alsaucm is LGPL 2.1 or later.

I think it is safe to assume that following explicit licence
compatibility clauses the complete package can be distributed under
the terms of GPL version 2, but this commit exposes the licence
information as precisely as possible.
---
 pkgs/by-name/al/alsa-utils/package.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/al/alsa-utils/package.nix b/pkgs/by-name/al/alsa-utils/package.nix
index 46c24bd3b3ba..343fce8dd957 100644
--- a/pkgs/by-name/al/alsa-utils/package.nix
+++ b/pkgs/by-name/al/alsa-utils/package.nix
@@ -87,7 +87,12 @@ stdenv.mkDerivation (finalAttrs: {
       MIDI functionality to the Linux-based operating system.
     '';
 
-    license = lib.licenses.gpl2;
+    license = with lib.licenses; [
+      gpl2Plus
+      gpl2Only # alsactl (init_{parse,sysdeps,sysfs,utils_{run,string}}.c, rest GPL 2.0+)
+      lgpl21Plus # alsaucm
+    ];
+
     platforms = lib.platforms.linux;
     maintainers = [ ];
   };