diff --git a/lib/inventory/build-inventory/default.nix b/lib/inventory/build-inventory/default.nix
index 14614be7a..21122605d 100644
--- a/lib/inventory/build-inventory/default.nix
+++ b/lib/inventory/build-inventory/default.nix
@@ -85,7 +85,7 @@ let
             in
             if module ? _class then module._class == "clan" else false;
 
-          getRoleFile = role: inventory.modules.${serviceName} + "/roles/${role}.nix";
+          getRoleFile = role: builtins.seq role inventory.modules.${serviceName} + "/roles/${role}.nix";
 
           resolvedRolesPerInstance = lib.mapAttrs (
             instanceName: instanceConfig: