diff --git a/pkgs/tools/misc/pk2cmd/default.nix b/pkgs/tools/misc/pk2cmd/default.nix
index 1012c724b62..e3a9e7b87c3 100644
--- a/pkgs/tools/misc/pk2cmd/default.nix
+++ b/pkgs/tools/misc/pk2cmd/default.nix
@@ -1,5 +1,7 @@
 {stdenv, fetchurl, libusb, makeWrapper}:
 
+assert stdenv.isLinux;
+
 stdenv.mkDerivation {
   name = "pk2cmd-1.20";
   src = fetchurl {