Add alsa-lib to shell.nix and flake.nix for audio support Reference: https://github.com/mackron/miniaudio/issues/267#issuecomment-770345648

Working-on-GNU-Linux.md

@@ -227,29 +227,37 @@ tar xvf external/5.5.tar.gz -C external/
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
   };
 
-  outputs = { self , nixpkgs ,... }: let
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: let
     system = "x86_64-linux";
   in {
     devShells."${system}".default = let
       pkgs = import nixpkgs {
         inherit system;
       };
-    in pkgs.mkShell {
-      packages = [
-        pkgs.libGL
-
-        # X11 dependencies
-        pkgs.xorg.libX11
-        pkgs.xorg.libX11.dev
-        pkgs.xorg.libXcursor
-        pkgs.xorg.libXi
-        pkgs.xorg.libXinerama
-        pkgs.xorg.libXrandr
-
-        # Uncomment the line below if you want to build Raylib with web support
-        # pkgs.emscripten
-      ];
-    };
+    in
+      pkgs.mkShell {
+        packages = [
+          pkgs.libGL
+
+          # X11 dependencies
+          pkgs.xorg.libX11
+          pkgs.xorg.libX11.dev
+          pkgs.xorg.libXcursor
+          pkgs.xorg.libXi
+          pkgs.xorg.libXinerama
+          pkgs.xorg.libXrandr
+
+          # Uncomment the line below if you want to build Raylib with web support
+          # pkgs.emscripten
+        ];
+
+        # Audio dependencies
+        LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [pkgs.alsa-lib];
+      };
   };
 }
 ```
@@ -264,23 +272,25 @@ nix develop
 
 Alternatively, you can create a `shell.nix` file in the root folder of your project with the following content:
 ```nix
-{ pkgs ? import <nixpkgs> {} }:
-
-  pkgs.mkShell {
-    nativeBuildInputs = [
-      pkgs.libGL
-
-      # X11 dependencies
-      pkgs.xorg.libX11
-      pkgs.xorg.libX11.dev
-      pkgs.xorg.libXcursor
-      pkgs.xorg.libXi
-      pkgs.xorg.libXinerama
-      pkgs.xorg.libXrandr
-
-      # Web support (uncomment to enable)
-      # pkgs.emscripten
-    ];
+{pkgs ? import <nixpkgs> {}}:
+pkgs.mkShell {
+  nativeBuildInputs = [
+    pkgs.libGL
+
+    # X11 dependencies
+    pkgs.xorg.libX11
+    pkgs.xorg.libX11.dev
+    pkgs.xorg.libXcursor
+    pkgs.xorg.libXi
+    pkgs.xorg.libXinerama
+    pkgs.xorg.libXrandr
+
+    # Web support (uncomment to enable)
+    # pkgs.emscripten
+  ];
+
+  # Audio dependencies
+  LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath [pkgs.alsa-lib];
 }
 ```