diff --git a/lib/user.nix b/lib/user.nix
index 86b71ba..cecec0f 100644
--- a/lib/user.nix
+++ b/lib/user.nix
@@ -11,7 +11,7 @@
       roles_mod = (map (r: mkHomeRole r) roles);
     in
     {
-      fileSystems."/home/${name}/Downloads" = {
+      fileSystems."/home/${name}/Downloads" =  pkgs.lib.mkIf stdenv.isLinux {
         device = "tmpfs";
         fsType = "tmpfs";
         options = [ "size=3G" ];