Unable to run sudo nixos-rebuild switch: "returned non-zero exit status 203."

I had to suddenly shutdown my computer while sudo nixos-rebuild switch –upgrade. When booting to complete the command, I’m now met with the following output: Command 'systemd-run -E LOCALE_ARCHIVE -E NIXOS_INSTALL_BOOTLOADER -E NIXOS_NO_CHECK --collect --no-ask-password --pipe --quiet --service-type=exec --unit=nixos-rebuild-switch-to-configuration /nix/store/3anjdskhwgar6aimj8qi633y76f8p7m0-nixos-system-nixos-26.05.7813.0dd31db7e6db/bin/switch-to-configuration switch' returned non-zero exit st...