diff --git a/flake.nix b/flake.nix
index 867bb8d..3c87fd2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -177,7 +177,7 @@ rust-project TODO: write shell script for automatically updating `cargoHash`
           serviceConfig = {
             Type = "oneshot";
             ExecStart  = ''
-              ${cfg.package}/bin/chrono_track --config-file ${builtins.toString cfg.config_path} --from_addr ${cfg.from_address}
+              ${cfg.package}/bin/chrono_track --config-file ${builtins.toString cfg.config_path} --from-addr ${cfg.from_address}
             '';
           };
         };