this derivation will be built:
  /nix/store/32v4lc1lnpyj249jdwy9dpk5c46s7f8f-iets-test-0.1.0.drv
error: Cannot build '/nix/store/32v4lc1lnpyj249jdwy9dpk5c46s7f8f-iets-test-0.1.0.drv'.
       Reason: builder failed with exit code 101.
       Output paths:
         /nix/store/jm366y0lg0ws5n2k7rvxc2a28xcdkh35-iets-test-0.1.0
       Last 25 log lines:
       >
       > thread 'fetch::http::tests::credentials_in_the_url_are_sent_and_never_printed' (4753) panicked at src/fetch/http.rs:986:57:
       > called `Result::unwrap()` on an `Err` value: Usage("cannot fetch 'http://user:***@127.0.0.1:35937/x': no response (stalled-download-timeout)")
       >
       > ---- fetch::http::tests::a_transient_status_is_retried stdout ----
       >
       > thread 'fetch::http::tests::a_transient_status_is_retried' (4752) panicked at src/fetch/http.rs:1014:57:
       > called `Result::unwrap()` on an `Err` value: Usage("cannot fetch 'http://127.0.0.1:46257/': no response (stalled-download-timeout)")
       > note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
       >
       > ---- fetch::http::tests::credentials_stay_on_the_first_origin stdout ----
       >
       > thread 'fetch::http::tests::credentials_stay_on_the_first_origin' (4754) panicked at src/fetch/http.rs:889:59:
       > called `Result::unwrap()` on an `Err` value: Usage("cannot fetch 'http://127.0.0.1:45387/': no response (stalled-download-timeout)")
       >
       >
       > failures:
       >     fetch::http::tests::a_transient_status_is_retried
       >     fetch::http::tests::credentials_in_the_url_are_sent_and_never_printed
       >     fetch::http::tests::credentials_stay_on_the_first_origin
       >     progress::tests::a_transfer_that_does_not_move_says_so
       >
       > test result: FAILED. 444 passed; 4 failed; 5 ignored; 0 measured; 0 filtered out; finished in 143.85s
       >
       > error: test failed, to rerun pass `--lib`
       For full logs, run:
         nix log /nix/store/32v4lc1lnpyj249jdwy9dpk5c46s7f8f-iets-test-0.1.0.drv