Partial build log
this derivation will be built:
/nix/store/zz4nqf88w573h6ls91fyvizsxvm5jxaa-source.drv
building '/nix/store/32j572pj8kv44bsnyavamcs027pwvp2p-source.drv'...
source> trying https://github.com/sagemath/sagetex/archive/v3.6.1.tar.gz
source> % Total % Received % Xferd Average Speed Time Time Time Current
source> Dload Upload Total Spent Left Speed
source> 100 105 100 105 0 0 410 0 --:--:-- --:--:-- --:--:-- 411
source> unpacking source archive /build/v3.6.1.tar.gz
source> tar: This does not look like a tar archive
source> gzip: stdin: not in gzip format
source> tar: Child returned status 1
source> tar: Error is not recoverable: exiting now
source> do not know how to unpack source archive /build/v3.6.1.tar.gz
error: builder for '/nix/store/32j572pj8kv44bsnyavamcs027pwvp2p-source.drv' failed with exit code 1
error: