diff --git a/pkgs/applications/misc/playonlinux/default.nix b/pkgs/applications/misc/playonlinux/default.nix
index c79d9c037d1..731cf5a6ba9 100644
--- a/pkgs/applications/misc/playonlinux/default.nix
+++ b/pkgs/applications/misc/playonlinux/default.nix
@@ -19,6 +19,8 @@
 , pkgsi686Linux
 }:
 
+assert stdenv.isLinux;
+
 let
   version = "4.2.9";