diff --git a/hosts/cube/grafana.nix b/hosts/cube/grafana.nix
index 4f7dfa2..a6194e7 100644
--- a/hosts/cube/grafana.nix
+++ b/hosts/cube/grafana.nix
@@ -30,6 +30,8 @@ in serverSystemConfiguration {
     settings.security = {
       admin_email    = "metrics@${domain}";
       admin_password = "$__file{${config.age.secrets."cube/passowrd.grafana".path}}";
+
+      disable_initial_admin_creation = true; # Just in case.
     };
   };
 
diff --git a/hosts/cube/prometheus.nix b/hosts/cube/prometheus.nix
index 76f46a8..c510f5e 100644
--- a/hosts/cube/prometheus.nix
+++ b/hosts/cube/prometheus.nix
@@ -1,11 +1,17 @@
 { config, ulib, ... }: with ulib;
 
 serverSystemConfiguration {
-  services.grafana.provision.datasources.settings.datasources = [{
-    name = "Prometheus";
-    type = "prometheus";
-    url  = "http://[::]:${toString config.services.prometheus.port}";
-  }];
+  services.grafana.provision.datasources.settings = {
+    datasources = [{
+      name = "Prometheus";
+      type = "prometheus";
+      url  = "http://[::]:${toString config.services.prometheus.port}";
+    }];
+
+    deleteDatasources = [{
+      name = "Prometheus";
+    }];
+  };
 
   services.prometheus = enabled {
     port          = 9000;