1 files changed, 1 insertions, 0 deletions
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/postfix.nix b/nixos/modules/services/monitoring/prometheus/exporters/postfix.nix
index 963fa7592565..f40819e826b0 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters/postfix.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters/postfix.nix
@@ -62,6 +62,7 @@ in
   };
   serviceOpts = {
     serviceConfig = {
+      DynamicUser = false;
       ExecStart = ''
         ${pkgs.prometheus-postfix-exporter}/bin/postfix_exporter \
           --web.listen-address ${cfg.listenAddress}:${toString cfg.port} \