this derivation will be built:
  /nix/store/nq63mfikscki3w5dqsxjw893090qv4bz-source-salted-jcqa0qds96xk.drv
building '/nix/store/nq63mfikscki3w5dqsxjw893090qv4bz-source-salted-jcqa0qds96xk.drv'...

trying https://httpbin.org/headers
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   238  100   238    0     0    490      0 --:--:-- --:--:-- --:--:--   490
/nix/store/hiirdv6zws8p3gjswfg7qq0an2ljyvyz-source-salted-jcqa0qds96xk