Firmware failed to load

Due to the specific hardware, I need to add some extra firmware packages: hardware.firmware = lib.mkBefore [ pkgs.linux-firmware-xxx ]; I used nix repl to inspect the corresponding derivation and its output, and confirmed that the files do exist. However, after rebuilding the system and rebooting, I still get ‘file not found’ errors in dmesg: remoteproc remoteproc1: Direct firmware load for qcom/sm8150/xiaomi/nabu/cdsp.mbn failed with error -2 remoteproc remoteproc2: Direct firmware load for...