diff --git a/flake.nix b/flake.nix
index 2d9e7828..0f9fabc1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,7 +16,7 @@
         pkgs = import nixpkgs { inherit system; overlays = [ devshell.overlays.default ]; };
         gems = pkgs.bundlerEnv rec {
           name = "accentor-api-env";
-          ruby = pkgs.ruby_3_3;
+          ruby = pkgs.ruby_3_3.override { jemallocSupport = true; };
           gemfile = ./Gemfile;
           lockfile = ./Gemfile.lock;
           gemset = ./gemset.nix;