diff --git a/flake.nix b/flake.nix
index caa825d..ef47459 100644
--- a/flake.nix
+++ b/flake.nix
@@ -107,7 +107,7 @@ Some utility commands:
           wantedBy = [ "network.target" ];
           serviceConfig = {
             ExecStart = ''
-              ${cfg.package}/bin/ji-chan --domain ${cfg.domain} --token ${cfg.token} --prefix "${builtins.replaceStrings ["\""] ["\\\""] cfg.prefix}" --hugo ${cfg.hugo} --guildData ${cfg.guildData}
+              ${cfg.package}/bin/ji-chan --domain ${cfg.domain} --token ${cfg.token} --prefix "${builtins.replaceStrings ["\"" "-"] ["\\\"" "\\-"] cfg.prefix}" --hugo ${cfg.hugo} --guilds ${cfg.guildData}
             '';
             Restart = "always";
             DynamicUser = true;