aarch64-darwin compatible nix

flake.nix

@@ -5,7 +5,7 @@
     self,
     nixpkgs,
   }: let
-    systems = ["x86_64-linux" "aarch64-linux"];
+    systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin"];
     forEachSystem = nixpkgs.lib.genAttrs systems;
     pkgsForEach = nixpkgs.legacyPackages;
   in {

nix/package.nix

@@ -1,5 +1,6 @@
 {
   lib,
+  stdenv,
   rustPlatform,
   pkg-config,
   makeBinaryWrapper,
@@ -45,13 +46,16 @@ in
       installShellFiles # installManPage
     ];
 
-    buildInputs = [
-      wayland
-      libxkbcommon
-      freetype
-      fontconfig
-      harfbuzz
-    ];
+    buildInputs =
+      [
+        freetype
+        fontconfig
+        harfbuzz
+      ]
+      ++ lib.optionals stdenv.hostPlatform.isLinux [
+        wayland
+        libxkbcommon
+      ];
 
     # Install the terminfo entry, and make the Wayland/xkb libraries (loaded via
     # dlopen, so not captured by rpath) discoverable at runtime.
@@ -63,7 +67,8 @@ in
       scdoc < doc/beer.1.scd > beer.1
       scdoc < doc/beer.toml.5.scd > beer.toml.5
       installManPage beer.1 beer.toml.5
-
+    ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       wrapProgram "$out/bin/beer" \
         --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [wayland libxkbcommon]}
     '';

nix/shell.nix

@@ -1,4 +1,6 @@
 {
+  lib,
+  stdenv,
   mkShell,
   rustc,
   cargo,
@@ -35,15 +37,18 @@ mkShell {
     scdoc # generate man pages from doc/*.scd
   ];
 
-  buildInputs = [
-    wayland
-    wayland-protocols
-    wayland-scanner
-    libxkbcommon
-    freetype
-    fontconfig
-    harfbuzz
-  ];
+  buildInputs =
+    [
+      freetype
+      fontconfig
+      harfbuzz
+    ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
+      wayland
+      wayland-protocols
+      wayland-scanner
+      libxkbcommon
+    ];
 
   # Compile the beer terminfo into a project-local database and put it ahead of
   # the system one, so TERM=beer resolves inside the shell (and for the shell