Partial build log
this derivation will be built:
/nix/store/rl6pkyp52lq4gv8nzzq7sbpn5gbpdm0j-source.drv
building '/nix/store/shn1hr5qnyfzliyb2qkm8p9xn6bymsmr-source.drv'...
source> error checking the existence of file:///dev/null//sha256-cywneIM0sHt1iQsNfjyQDoDfdRjxpz4l3rfysi9YN20=:
source> curl: (37) Couldn't open file /dev/null//sha256-cywneIM0sHt1iQsNfjyQDoDfdRjxpz4l3rfysi9YN20=
source> trying https://github.com/4ti2/4ti2/archive/Release_1_6_9.tar.gz
source> % Total % Received % Xferd Average Speed Time Time Time Current
source> Dload Upload Total Spent Left Speed
source> 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
source> 100 4882k 0 4882k 0 0 2122k 0 --:--:-- 0:00:02 --:--:-- 2583k
source> unpacking source archive /build/Release_1_6_9.tar.gz