Replaces `[[ $# > 0 ]]` with `(( $# > 0 ))` for clarity and correctness. This ensures improved readability and adherence to best practices in Bash scripting.
This commit adds support for the Brother DCP-L2530DW printer driver. The new file, dcpl2530dw-cups/default.nix, includes necessary build inputs and sets up installation paths. Currently, this build only supports the x86_64 platform.
