these 15 derivations will be built:
  /nix/store/1z3cgmyv52vkvqv6xs3hijdjzcjq2q7k-Cargo.toml.drv
  /nix/store/26b0m67c06zi9yxm0fvh97vzz79hi810-Cargo.toml.drv
  /nix/store/3y0c9735wwv4mm4zr0fl1b7vhzazrz50-Cargo.toml.drv
  /nix/store/b7cj8hsir9j9qdpa61afnnwy8yw81zxl-Cargo.toml.drv
  /nix/store/bgc1jf4g3gabrkgzlpkhaqw4rd1p1pl9-Cargo.toml.drv
  /nix/store/cpb0slggnnssimgaw486vzcpn8kqw0xz-Cargo.toml.drv
  /nix/store/hmf9wjhpwmr1fqfjydd8zvih10pri1z7-Cargo.toml.drv
  /nix/store/iqv5p9ilis0c248krcbmygxzc8g99mmg-Cargo.toml.drv
  /nix/store/rczzhfxjjbzcn2qp7sf0jrqym1ccckjy-Cargo.toml.drv
  /nix/store/v9fmaa1fzi0lj0z6xbgn96g5r21mnvgg-Cargo.toml.drv
  /nix/store/7aj3cfv7yaxrpjzpvcvmrv64455qiy1l-source.drv
  /nix/store/8kckyf248jxa7kmr0xmdgxyszwh1d1xg-tinc-sptps-test-c-1.1pre18.drv
  /nix/store/8s16p0hxc7rmadxjz0ygvpvwn0rnhw6a-tinc-tincd-c-1.1pre18.drv
  /nix/store/qmfxkrx9lrqra247xz0r7b7x322fs6qh-tincd-deps-0.1.0.drv
  /nix/store/fdf3mynqr7qks6bl7a53a156bhnpr6nz-tincd-test-0.1.0.drv
these 3 paths will be fetched (89.5 KiB download, 261.6 KiB unpacked):
  /nix/store/86cwlx3c37rcycwhhhqaslvkg2yfmpcv-iperf-3.21
  /nix/store/z2w8ggsb91dzzawrars0p1n8x83vigq4-iperf-3.21-dev
  /nix/store/p9zfs5yc7kas2dr9nbs4hnf907ai3vkq-iperf-3.21-lib