diff --git a/modules/verify.nix b/modules/verify.nix
index 308a3f8..23cba66 100644
--- a/modules/verify.nix
+++ b/modules/verify.nix
@@ -73,7 +73,9 @@ in
         lib.nameValuePair "nix-verifiers@${service-name}" {
           requires = [ "multi-user.target" ];
           after = [ "multi-user.target" ];
-          description = "Verify nix store (verify-contents: ${verify-contents}, verify-trust: ${verify-trust}, signatures-needed: ${signatures-needed})";
+          description =
+            "Verify nix store (verify-contents: ${lib.boolToString verify-contents}, verify-trust: "
+            + "${lib.boolToString verify-trust}, signatures-needed: ${builtins.toString signatures-needed})";
           serviceConfig = {
             Type = "oneshot";
             User = "root";