structuredAttrs is enabled trying https://github.com/slopus/happy/archive/b16b23c5b8ab14415bb75fc8a49a3c051e5b424e.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 9.25M 0 9.25M 0 0 7.55M 0 00:01 9.25M 100 30.28M 0 30.28M 0 0 13.58M 0 00:02 15.10M 100 53.76M 0 53.76M 0 0 16.65M 0 00:03 17.89M 100 78.75M 0 78.75M 0 0 18.60M 0 00:04 19.65M 100 107.0M 0 107.0M 0 0 20.45M 0 00:05 21.37M 100 111.8M 0 111.8M 0 0 20.51M 0 00:05 21.37M 100 111.8M 0 111.8M 0 0 20.50M 0 00:05 21.37M 100 111.8M 0 111.8M 0 0 20.50M 0 00:05 21.37M unpacking source archive /nix/var/nix/builds/nix-89659-193804859/download.tar.gz