diff --git a/pkgs/tools/networking/htpdate/default.nix b/pkgs/tools/networking/htpdate/default.nix
index f0bb4ab46fae..c8e14ad7f697 100644
--- a/pkgs/tools/networking/htpdate/default.nix
+++ b/pkgs/tools/networking/htpdate/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Utility to fetch time and set the system clock over HTTP";
     homepage = http://www.vervest.org/htp/;
-    platforms = platforms.unix;
+    platforms = platforms.linux;
     license = licenses.gpl2Plus;
   };
 }