1 files changed, 2 insertions, 2 deletions
diff --git a/nixos/modules/bcg.nix b/nixos/modules/bcg.nix
index 3146c15..ea89e3a 100644
--- a/nixos/modules/bcg.nix
+++ b/nixos/modules/bcg.nix
@@ -146,14 +146,14 @@ in {
       envConfig = cfg.environmentFiles != [];
       finalConfig =
         if envConfig
-        then "$RUNTIME_DIRECTORY/bcg.config.yaml"
+        then "\${RUNTIME_DIRECTORY}/bcg.config.yaml"
         else configFile;
     in {
       description = "BigClown Gateway";
       wantedBy = ["multi-user.target"];
       wants = ["network-online.target"] ++ lib.optional config.services.mosquitto.enable "mosquitto.service";
       after = ["network-online.target"];
-      preStart = ''
+      preStart = mkIf envConfig ''
         umask 077
         ${pkgs.envsubst}/bin/envsubst -i "${configFile}" -o "${finalConfig}"
       '';