From 03eb0b15127808f7d59ff2844e5e16d186a819b6 Mon Sep 17 00:00:00 2001
From: Henrik Lissner <henrik@lissner.net>
Date: Mon, 5 Jul 2021 16:46:30 -0400
Subject: [PATCH] alsa-lib 1.2.5 -> 1.2.5.1

Fixes ALSA failing to find sound devices. Revert this once 1.2.5.1 makes
it into nixos-unstable. This unfortunately causes a lot of compiling at
nixos-rebuild time.
---
 modules/hardware/audio.nix | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/modules/hardware/audio.nix b/modules/hardware/audio.nix
index 9508b3d4..9b70b0da 100644
--- a/modules/hardware/audio.nix
+++ b/modules/hardware/audio.nix
@@ -9,6 +9,21 @@ in {
   };
 
   config = mkIf cfg.enable {
+    # HACK Due to alsa-project/alsa-lib#143, ALSA/pulseaudio can't find sound
+    #      devices. The 1.2.5.1 hotfix addresses this, but isn't in nixpkgs yet.
+    nixpkgs.overlays = [
+      (self: super: with super; {
+        alsa-lib = super.alsa-lib.overrideAttrs (old: rec {
+          pname = "alsa-lib";
+          version = "1.2.5.1";
+          src = pkgs.fetchurl {
+            url = "mirror://alsa/lib/${pname}-${version}.tar.bz2";
+            sha256 = "sha256-YoQh2VDOyvI03j+JnVIMCmkjMTyWStdR/6wIHfMxQ44=";
+          };
+        });
+      })
+    ];
+
     sound.enable = true;
     hardware.pulseaudio.enable = true;