I'm trying to get this toolchain (minus vivado) running on Mac OS 10.14.6, and have run into a few problems; some may be Mac related, and perhaps that's unsupported, but some seem more general.

Following the Readme:
Set up all tools and added them to my path, set appropriate environment variables.
$ source settings.sh
no such file. From the git history, it looks like it's been renamed env.sh, so I used that instead.
$ make env
no such target. Looks like make conda might be appropriate, since we're setting up a python environment. So I ran that, and did some manual setup that I don't recall at the moment to get things running.
$ python3 fpgaperf.py --toolchain arachne --project oneblink --device "hx8k" --package "ct256" --board "breakout"
fpgaperf.py: error: --family argument required. Looks like it's missing a required flag. Looking at the next example, I set family to xc7. This may well be wrong, but it made the tool run.
That ran the Yosys portion successfully, but then generated the following error:

End of script. Logfile hash: af0a50ac80, CPU: user 0.38s system 0.06s
Yosys 0.9+1706 (git sha1 2bda51ac, gcc 10.0.1 -fPIC -Os)
Time spent: 44% 12x read_verilog (0 sec), 14% 1x share (0 sec), ...
arachne-pnr -d 8k -P ct256 -q -p empty.pcf oneblink.blif -o oneblink_arachne.asc
oneblink.blif:10: fatal error: unknown directive '.subckt'
make: *** [oneblink_arachne.asc] Error 1
rm oneblink.blif

This looks like something I've run into before when trying to read hierarchical blifs with tools that don't support them. But at this point I decided to ask for help.
It seems like the readme is out of date; if anyone could direct me on how to properly get started with this tool, I'd really appreciate it.

Thanks,
Scott