this derivation will be built:
  /nix/store/l5pq4zsjgpd7kn9b80w3mmx5sw1344v4-harmonia-llvm-cov-3.3.0.drv
error: Cannot build '/nix/store/l5pq4zsjgpd7kn9b80w3mmx5sw1344v4-harmonia-llvm-cov-3.3.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/6wnij2xncljnsjbwnjr1v7l2bywi06s2-harmonia-llvm-cov-3.3.0
       Last 25 log lines:
       >         PASS [   3.987s] (2212/2515) harmonia-store-gc::integration gc_dry_run_serves_socket_and_honors_roots
       >         PASS [   4.006s] (2213/2515) harmonia-store-gc::integration gc_does_not_hang_on_tmp_fifo
       >         PASS [   4.345s] (2214/2515) harmonia-store-gc::integration gc_cleans_unused_links_only_when_not_dry_run
       >         PASS [   4.837s] (2215/2515) harmonia-store-aterm input_address::tests::hash_derivation_deterministic
       >         PASS [   4.739s] (2216/2515) harmonia-store-gc::integration gc_drops_partial_temp_root
       >         PASS [   4.729s] (2217/2515) harmonia-store-gc::integration gc_keeps_deriver_of_alive_path
       >         PASS [   4.730s] (2218/2515) harmonia-store-gc::integration gc_keeps_ca_outputs_of_alive_drv
       >         PASS [   4.709s] (2219/2515) harmonia-store-gc::integration gc_max_freed_stops_early
       >         PASS [   4.778s] (2220/2515) harmonia-store-gc::integration gc_keep_recent_pins_recently_registered
       >         PASS [   4.777s] (2221/2515) harmonia-store-gc::integration gc_max_freed_batches_by_estimated_size
       >         PASS [   4.792s] (2222/2515) harmonia-store-gc::integration gc_max_freed_referrer_never_outlives_reference
       >         PASS [   5.488s] (2223/2515) harmonia-store-aterm input_address::tests::fill_outputs_consistent_with_make_output_path
       >         PASS [   6.525s] (2224/2515) harmonia-file-nar archive::parser::unittests::proptest_parse_stream
       >         PASS [   5.954s] (2225/2515) harmonia-store-aterm input_address::tests::hash_derivation_varies
       >         PASS [   8.331s] (2226/2515) harmonia-file-nar archive::restorer::proptests::proptest_restore_dump
       >         PASS [   8.826s] (2227/2515) harmonia-protocol ser::mock::proptests::proptest_mock
       >         PASS [  12.675s] (2228/2515) harmonia-store-gc::integration gc_vacuums_db_after_mass_deletion
       >         PASS [  25.065s] (2229/2515) harmonia-cache::retry test_download_retry_over_flaky_connection
       >         PASS [  46.881s] (2230/2515) harmonia-protocol wire_roundtrip::roundtrip_query_missing_result
       > ────────────
       >      Summary [  47.554s] 2230/2515 tests run: 2228 passed, 2 failed, 0 skipped
       >         FAIL [   0.225s] (2040/2515) harmonia-store-derivation::json_upstream derived_path::test_derived_path_built::from_json
       >         FAIL [   0.229s] (2042/2515) harmonia-store-derivation::json_upstream derived_path::test_derived_path_built::to_json
       > warning: 285/2515 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/l5pq4zsjgpd7kn9b80w3mmx5sw1344v4-harmonia-llvm-cov-3.3.0.drv