diff --git a/pkgs/tools/networking/zap/default.nix b/pkgs/tools/networking/zap/default.nix
index 2d8902f69097..f12578b27338 100644
--- a/pkgs/tools/networking/zap/default.nix
+++ b/pkgs/tools/networking/zap/default.nix
@@ -1,5 +1,6 @@
-{ stdenv, fetchFromGitHub, jdk, ant, runtimeShell }:
+{ stdenv, fetchFromGitHub, jdk8, ant, runtimeShell }:
 
+let jdk = jdk8; in
 stdenv.mkDerivation rec {
   pname = "zap";
   version = "2.7.0";