Partial build log
this derivation will be built:
/nix/store/xn8msidyqzdiz4kvaygprfb5m1b3bhmz-source.drv
building '/nix/store/nwl0i20zmy9h816jg9m0c5g1868jy46q-source.drv'...
source> error checking the existence of file:///dev/null/sha256/12cv5ms1j3vfrq066km020nwxb6x2dzh12g8nz6xxyxysn44wzzi:
source> curl: (37) Couldn't open file /dev/null/sha256/12cv5ms1j3vfrq066km020nwxb6x2dzh12g8nz6xxyxysn44wzzi
source> trying https://github.com/acl2-devel/acl2-devel/archive/8.5.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 212M 0 212M 0 0 8211k 0 --:--:-- 0:00:26 --:--:-- 10.8M
source> unpacking source archive /build/8.5.tar.gz