this derivation will be built:
  /nix/store/lbbk99bp8pk7rsf35x9y75ivs9yk4a3g-harmonia-llvm-cov-3.1.0.drv
error: Cannot build '/nix/store/lbbk99bp8pk7rsf35x9y75ivs9yk4a3g-harmonia-llvm-cov-3.1.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/f199acfj2s6yj71687fb8qf81xcf28hs-harmonia-llvm-cov-3.1.0
       Last 25 log lines:
       >         PASS [   0.819s] ( 940/2250) harmonia-cache::chroot test_chroot
       >         PASS [   0.828s] ( 941/2250) harmonia-cache::signing test_signing
       >         PASS [   2.285s] ( 942/2250) harmonia-protocol ser::mock::proptests::proptest_mock
       >         PASS [   2.529s] ( 943/2250) harmonia-file-nar archive::restorer::proptests::proptest_restore_dump
       >         PASS [  30.076s] ( 944/2250) harmonia-cache::retry test_download_retry_over_flaky_connection
       > ────────────
       >      Summary [  30.079s] 944/2250 tests run: 928 passed, 16 exec failed, 0 skipped
       >        XFAIL [   0.001s] ( 561/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_02_one::chunks_size_06_6::buf_size_05_5
       >        XFAIL [   0.000s] ( 562/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_04_4::buf_size_03_3
       >        XFAIL [   0.000s] ( 563/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_04_4::buf_size_02_2
       >        XFAIL [   0.000s] ( 564/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_02_one::chunks_size_06_6::buf_size_08_8
       >        XFAIL [   0.002s] ( 565/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_02_one::chunks_size_06_6::buf_size_06_6
       >        XFAIL [   0.000s] ( 566/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_03_3::buf_size_09_9
       >        XFAIL [   0.000s] ( 567/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_03_3::buf_size_06_6
       >        XFAIL [   0.000s] ( 572/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_02_2::buf_size_07_7
       >        XFAIL [   0.000s] ( 583/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_03_3::buf_size_04_4
       >        XFAIL [   0.000s] ( 584/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_03_3::buf_size_10_1024
       >        XFAIL [   0.000s] ( 585/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_02_one::chunks_size_07_7::buf_size_08_8
       >        XFAIL [   0.000s] ( 586/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_04_4::buf_size_01_1
       >        XFAIL [   0.000s] ( 587/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_03_3::buf_size_08_8
       >        XFAIL [   0.000s] ( 588/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_03_3::buf_size_07_7
       >        XFAIL [   0.000s] ( 589/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_03_two::chunks_size_03_3::buf_size_05_5
       >        XFAIL [   0.000s] ( 590/2250) harmonia-protocol ser::writer::unittests::test_write_slice::case_02_one::chunks_size_07_7::buf_size_05_5
       > warning: 1306/2250 tests were not run due to test failure (run with --no-fail-fast to run all tests, or run with --max-fail)
       > error: test run failed
       For full logs, run:
         nix log /nix/store/lbbk99bp8pk7rsf35x9y75ivs9yk4a3g-harmonia-llvm-cov-3.1.0.drv