diff --git a/pkgs/servers/dns/knot-dns/default.nix b/pkgs/servers/dns/knot-dns/default.nix
index 2bdd758b980..50951c8cb82 100644
--- a/pkgs/servers/dns/knot-dns/default.nix
+++ b/pkgs/servers/dns/knot-dns/default.nix
@@ -30,7 +30,8 @@ stdenv.mkDerivation rec {
 
   CFLAGS = [ "-O2" "-DNDEBUG" ];
 
-  #doCheck = true; problems in combination with dynamic linking
+  doCheck = true;
+  doInstallCheck = false; # needs pykeymgr?
 
   postInstall = ''rm -r "$out"/var "$out"/lib/*.la'';