diff --git a/flake.nix b/flake.nix
index 43ae390..282b23f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -87,9 +87,10 @@
 
       dockerImage = pkgs.dockerTools.buildImage {
         name = "vrchat-prometheus-exporter";
+        copyToRoot = [ my-crate pkgs.cacert ];
+
         config = {
           Cmd = [ "${my-crate}/bin/vr-event-tracker" ];
-          contents = [ my-crate pkgs.cacert ];
           ExposedPorts = {
             "6534/tcp" = {};
           };