diff --git a/lib/fudo/grafana.nix b/lib/fudo/grafana.nix
index 3cd0184..53e366d 100644
--- a/lib/fudo/grafana.nix
+++ b/lib/fudo/grafana.nix
@@ -198,7 +198,7 @@ in {
       grafana = {
         enable = true;
 
-        dataDir = cfg.state-directory;
+        dataDir = toPath cfg.state-directory;
 
         settings = {