diff --git a/services/mattermost.nix b/services/mattermost.nix
index 7505138..b02e613 100644
--- a/services/mattermost.nix
+++ b/services/mattermost.nix
@@ -30,9 +30,6 @@ in {
 
       systemd.services.mattermost.serviceConfig.EnvironmentFile =
         "/secrets/env";
-      # overwrite the -c flag given in the module. this can be removed once we're on nixos 22.05
-      systemd.services.mattermost.serviceConfig.ExecStart =
-        lib.mkForce "${pkgs.mattermost}/bin/mattermost -c /persist/mattermost/config/config.json";
 
       # couldn't figure out how to actually overwrite modules, so now
       # there's two mattermost modules ...