Partial build log
this derivation will be built:
/nix/store/lida0wv6zwmvymd7fnqj7nim1qrkb3l6-xar-1.6.1.tar.gz.drv
building '/nix/store/r6mh7yv3bk1c9hqyvz4dal0bs52cvw1c-xar-1.6.1.tar.gz.drv'...
xar> trying https://github.com/downloads/mackyle/xar/xar-1.6.1.tar.gz
xar> % Total % Received % Xferd Average Speed Time Time Time Current
xar> Dload Upload Total Spent Left Speed
xar> 0 23 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
xar> curl: (22) The requested URL returned error: 502
xar> Warning: Problem : HTTP error. Will retry in 1 seconds. 3 retries left.
xar> 0 23 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
xar> curl: (22) The requested URL returned error: 502
xar> Warning: Problem : HTTP error. Will retry in 2 seconds. 2 retries left.
xar> 0 23 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
xar> curl: (22) The requested URL returned error: 502
xar> Warning: Problem : HTTP error. Will retry in 4 seconds. 1 retries left.
xar> 0 23 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
xar> curl: (22) The requested URL returned error: 502
xar> error checking the existence of file:///dev/null/sha256/0ghmsbs6xwg1092v7pjcibmk5wkyifwxw6ygp08gfz25d2chhipf:
xar> curl: (37) Couldn't open file /dev/null/sha256/0ghmsbs6xwg1092v7pjcibmk5wkyifwxw6ygp08gfz25d2chhipf
xar> error: cannot download xar-1.6.1.tar.gz from any mirror
error: builder for '/nix/store/r6mh7yv3bk1c9hqyvz4dal0bs52cvw1c-xar-1.6.1.tar.gz.drv' failed with exit code 1
error: