diff --git a/pkgs/applications/misc/bklk/default.nix b/pkgs/applications/misc/bklk/default.nix
index 86b596d395ec..62aeb7c91a5f 100644
--- a/pkgs/applications/misc/bklk/default.nix
+++ b/pkgs/applications/misc/bklk/default.nix
@@ -11,6 +11,8 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-R3H6tv6fzQG41Y2rui0K8fdQ/+Ywnc5hqTPFjktrhF8=";
   };
 
+  makeFlags = [ "CC=$$CXX" ];
+
   buildInputs = [ ncurses ];
 
   installPhase = ''