diff --git a/modules/system/services/victorialogs.nix b/modules/system/services/victorialogs.nix
index 63af76c..b696dce 100644
--- a/modules/system/services/victorialogs.nix
+++ b/modules/system/services/victorialogs.nix
@@ -46,9 +46,10 @@ in
 
     services.victorialogs = {
       enable = true;
+      # The victorialogs grafana-dashboard expects the version label to have the format `victoria-logs-*`
       package = pkgs-unstable.victorialogs.overrideAttrs (
         _: previousAttrs: {
-          version = "victoria-logs-" + previousAttrs.version;
+          version = "victoria-logs-${previousAttrs.version}";
           __intentionallyOverridingVersion = true;
         }
       );
diff --git a/modules/system/services/victoriametrics.nix b/modules/system/services/victoriametrics.nix
index 169cf98..c996759 100644
--- a/modules/system/services/victoriametrics.nix
+++ b/modules/system/services/victoriametrics.nix
@@ -45,7 +45,7 @@ in
       # The victoriametrics grafana-dashboard expects the version label to have the format `victoria-metrics-*`
       package = pkgs-unstable.victoriametrics.overrideAttrs (
         _: previousAttrs: {
-          version = "victoria-metrics-" + previousAttrs.version;
+          version = "victoria-metrics-${previousAttrs.version}";
           __intentionallyOverridingVersion = true;
         }
       );