diff --git a/lib/fudo/grafana.nix b/lib/fudo/grafana.nix
index 2581f1d..d05dc72 100644
--- a/lib/fudo/grafana.nix
+++ b/lib/fudo/grafana.nix
@@ -145,7 +145,7 @@ in {
     };
 
     datasources = mkOption {
-      type = attrsOf (submodule datasourceOpts);
+      type = listOf (submodule datasourceOpts);
       description = "A list of datasources supplied to Grafana.";
       default = { };
     };
diff --git a/lib/fudo/local-network.nix b/lib/fudo/local-network.nix
index 3473763..1af8611 100644
--- a/lib/fudo/local-network.nix
+++ b/lib/fudo/local-network.nix
@@ -126,6 +126,13 @@ in {
         hostname
       ]) other-hosts;
 
+    systemd = {
+      tmpfiles.rules = [ "d ${cfg.state-directory} 0700 root root - -" ];
+
+      services.kea-dhcp4-server.serviceConfig.ReadWritePaths =
+        [ cfg.state-directory ];
+    };
+
     services.kea.dhcp4 = {
       enable = true;
       settings = {