only include wayland in devshell on macos

linux/nix/devshell.nix

@@ -18,12 +18,13 @@ let
   };
 in
 pkgs.mkShell {
-  packages = with pkgs; [
+  packages =
+    with pkgs;
+    [
       go
       git
       jdk17
       libGL
-    wayland
       (flutter.override {
         extraPkgConfigPackages = [
           mpv-unwrapped
@@ -31,7 +32,8 @@ pkgs.mkShell {
         ];
       })
       android.platform-tools
-  ];
+    ]
+    ++ lib.optional pkgs.stdenv.isLinux wayland;
 
   env = rec {
     LIBCLANG_PATH = lib.makeLibraryPath [ pkgs.libclang ];