diff --git a/pkgs/applications/window-managers/ion-3/default.nix b/pkgs/applications/window-managers/ion-3/default.nix
index f4199073077..c13b950599e 100644
--- a/pkgs/applications/window-managers/ion-3/default.nix
+++ b/pkgs/applications/window-managers/ion-3/default.nix
@@ -5,6 +5,8 @@ stdenv.mkDerivation {
   meta = {
     description = "Tiling tabbed window manager designed with keyboard users in mind";
     homepage = http://modeemi.fi/~tuomov/ion;
+    platforms = with stdenv.lib.platforms; linux;
+    license = stdenv.lib.licenses.lgpl21;
   };
   src = fetchurl {
     url = http://tuomov.iki.fi/software/dl/ion-3-20090110.tar.gz;