trying https://github.com/zerotier/ZeroTierOne/archive/master.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0   0     0   0     0     0     0  --:--:-- --:--:-- --:--:--     0
100 10634k 100 10634k   0     0 19726k     0  --:--:-- --:--:-- --:--:-- 19726k
unpacking source archive /nix/var/nix/builds/nix-3423-2193460713/download.tar.gz