Nix derivations for tools that I used for development on the ULX3S FPGA board.
There is also a module that enables users of the dialout group to
access the ULX3S USB devices without root:
% sudo nix-channel --add https://github.com/blitz/ulx3s-tools/archive/main.tar.gz ulx3s-tools
# Now add <ulx3s-tools/module> to your module list.