Issues with firmware during `nixos-install`

While running nixos-install, I get the following messages:

WARNING: missing firmware renesas_usb_fw.mem for module /nix/store/kzd7kkackv9k56si67qy9gzcaxjanfar-linux-5.15.103-modules/lib/modules/5.15.103/kernel/drivers/usb/host/xhci-pci.ko.xz
depmod: WARNING: could not open modules.builtin.modinfo at /nix/store/4j0vnccd06bccgpdz1v7dv9gi3fiq3hv-linux-5.15.103-modules-shrunk/lib/modules/5.15.103: No such file or directory

Should this be reported as a bug? What are the consequences of the problem indicated?

There is somewhere firmware missing which seems to be an upstream problem Since 5.8.x kernel required renesas xhci firmware blob - #10 by philm - Packaging - Manjaro Linux Forum

not sure if we should or want to enable another flag in kernel config