diff --git a/nix/pkgs.nix b/nix/pkgs.nix
index 7d2702dd..728661cb 100644
--- a/nix/pkgs.nix
+++ b/nix/pkgs.nix
@@ -40,6 +40,7 @@ let
         # This is similar to jailbreakCabal, however it
         # does not require any messing with cabal files.
         packages.katip.components.library.doExactConfig = true;
+        packages.ekg.components.library.enableSeparateDataOutput = true;
         packages.typed-protocols.configureFlags = [ "--ghc-option=-Werror" ];
         packages.io-sim.configureFlags = [ "--ghc-option=-Werror" ];
         packages.io-sim-classes.configureFlags = [ "--ghc-option=-Werror" ];