diff --git a/pkgs/tools/networking/nc6/default.nix b/pkgs/tools/networking/nc6/default.nix
index 348fc2e26a64..9c0979294715 100644
--- a/pkgs/tools/networking/nc6/default.nix
+++ b/pkgs/tools/networking/nc6/default.nix
@@ -4,7 +4,10 @@ stdenv.mkDerivation {
   name = "nc6-1.0";
 
   src = fetchurl {
-    url = ftp://ftp.deepspace6.net/pub/ds6/sources/nc6/nc6-1.0.tar.bz2;
+    urls = [
+      ftp://ftp.deepspace6.net/pub/ds6/sources/nc6/nc6-1.0.tar.bz2
+      http://fossies.org/linux/privat/nc6-1.0.tar.bz2
+    ];
     sha256 = "01l28zv1yal58ilfnz6albdzqqxzsx3a58vmc14r9gv0bahffdgb";
   };