diff --git a/pkgs/tools/networking/telnet/default.nix b/pkgs/tools/networking/telnet/default.nix
index ba00bb6b598..c0dbf710ffb 100644
--- a/pkgs/tools/networking/telnet/default.nix
+++ b/pkgs/tools/networking/telnet/default.nix
@@ -14,5 +14,6 @@ stdenv.mkDerivation {
     description = "A client and daemon for the Telnet protocol";
     homepage = ftp://ftp.suse.com/pub/people/kukuk/ipv6/;
     license = "BSD";
+    platforms = stdenv.lib.platforms.gnu;
   };
 }