structuredAttrs is enabled trying https://github.com/slopus/happy/archive/88d8ee9f2f69b215dae7b091a1d6b285acc6122b.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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100 9.49M 0 9.49M 0 0 7.70M 0 00:01 9.50M 100 30.71M 0 30.71M 0 0 13.76M 0 00:02 15.37M 100 55.00M 0 55.00M 0 0 17.00M 0 00:03 18.32M 100 82.02M 0 82.02M 0 0 19.36M 0 00:04 20.50M 100 111.5M 0 111.5M 0 0 21.31M 0 00:05 22.31M 100 111.8M 0 111.8M 0 0 21.29M 0 00:05 22.31M 100 111.8M 0 111.8M 0 0 21.29M 0 00:05 22.31M 100 111.8M 0 111.8M 0 0 21.29M 0 00:05 22.31M unpacking source archive /nix/var/nix/builds/nix-78706-3537581851/download.tar.gz