this derivation will be built:
  /nix/store/0k42rxnfjlc8capcgc6fs4r7maa8bf27-harmonia-llvm-cov-3.2.0.drv
error: Cannot build '/nix/store/0k42rxnfjlc8capcgc6fs4r7maa8bf27-harmonia-llvm-cov-3.2.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/3k994bcr3bzngby18fxnf8kxxr2v9sqc-harmonia-llvm-cov-3.2.0
       Last 25 log lines:
       >         PASS [   8.628s] (2066/2389) harmonia-store-gc::integration gc_chunk_size_one_deletes_whole_dead_chain
       >         PASS [   8.729s] (2067/2389) harmonia-store-gc::integration gc_max_freed_batches_by_estimated_size
       >         PASS [   8.749s] (2068/2389) harmonia-store-gc::integration gc_keeps_ca_outputs_of_alive_drv
       >         PASS [   8.768s] (2069/2389) harmonia-store-gc::integration gc_drops_partial_temp_root
       >         PASS [   8.779s] (2070/2389) harmonia-store-gc::integration gc_removes_stale_temp_roots_file
       >         PASS [   8.838s] (2071/2389) harmonia-store-gc::integration gc_max_freed_referrer_never_outlives_reference
       >         PASS [   8.862s] (2072/2389) harmonia-store-gc::integration gc_ignores_invalid_store_basenames
       >         PASS [   8.841s] (2073/2389) harmonia-store-gc::integration gc_runtime_roots_validated_against_db
       >         PASS [   8.972s] (2074/2389) harmonia-store-gc::integration gc_cleans_unused_links_only_when_not_dry_run
       >         PASS [   9.044s] (2075/2389) harmonia-store-gc::integration gc_keep_recent_pins_recently_registered
       >         PASS [   9.099s] (2076/2389) harmonia-store-gc::integration gc_keeps_transitive_closure
       >         PASS [   9.175s] (2077/2389) harmonia-store-gc::integration gc_keeps_ca_output_via_build_trace
       >         PASS [   9.371s] (2078/2389) harmonia-store-gc::integration gc_removes_unlocked_tmp_dir
       >         PASS [   9.917s] (2079/2389) harmonia-store-gc::integration gc_store_dir_trailing_slash_is_normalized
       >         PASS [  10.152s] (2080/2389) harmonia-store-gc::integration gc_keeps_unknown_path_registered_after_snapshot
       >         PASS [  10.310s] (2081/2389) harmonia-store-gc::integration gc_rebases_canonical_runtime_roots_to_logical_store
       >         PASS [  10.405s] (2082/2389) harmonia-store-gc::integration gc_keeps_ca_deriver_via_deriver_field_not_build_trace
       >         PASS [  17.143s] (2083/2389) harmonia-protocol wire_roundtrip::roundtrip_query_missing_result
       >         PASS [  22.735s] (2084/2389) harmonia-store-gc::integration gc_vacuums_db_after_mass_deletion
       >         PASS [  25.701s] (2085/2389) harmonia-cache::retry test_download_retry_over_flaky_connection
       > ────────────
       >      Summary [  25.703s] 2085/2389 tests run: 2084 passed, 1 failed, 0 skipped
       >         FAIL [   1.016s] (1702/2389) harmonia-cache::signing test_signing
       > warning: 304/2389 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/0k42rxnfjlc8capcgc6fs4r7maa8bf27-harmonia-llvm-cov-3.2.0.drv