diff --git a/pkgs/by-name/th/thc-ipv6/package.nix b/pkgs/by-name/th/thc-ipv6/package.nix
index f44334bd3628..cd3daa1f7c3c 100644
--- a/pkgs/by-name/th/thc-ipv6/package.nix
+++ b/pkgs/by-name/th/thc-ipv6/package.nix
@@ -40,6 +40,8 @@ stdenv.mkDerivation rec {
     "PREFIX=$(out)"
   ];
 
+  enableParallelBuilding = true;
+
   meta = {
     description = "IPv6 attack toolkit";
     homepage = "https://github.com/vanhauser-thc/thc-ipv6";