this derivation will be built:
  /nix/store/7jig3jkxks17gz6kywr01vy1kwdz2i9k-harmonia-llvm-cov-3.3.0.drv
error: Cannot build '/nix/store/7jig3jkxks17gz6kywr01vy1kwdz2i9k-harmonia-llvm-cov-3.3.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/7f7d1insb87bybv0m790qc374kdq9vxp-harmonia-llvm-cov-3.3.0
       Last 25 log lines:
       >         PASS [  16.938s] (2496/2515) harmonia-store-gc::integration gc_keeps_runtime_roots_from_environ
       >         PASS [  16.926s] (2497/2515) harmonia-store-gc::integration gc_removes_dangling_auto_root
       >         PASS [  16.941s] (2498/2515) harmonia-store-gc::integration gc_rebases_canonical_runtime_roots_to_logical_store
       >         PASS [  17.011s] (2499/2515) harmonia-store-gc::integration gc_max_freed_referrer_never_outlives_reference
       >         PASS [  17.023s] (2500/2515) harmonia-store-gc::integration gc_keeps_ca_deriver_via_deriver_field_not_build_trace
       >         PASS [  17.025s] (2501/2515) harmonia-store-gc::integration gc_keeps_runtime_roots_from_open_fd
       >         PASS [  17.109s] (2502/2515) harmonia-store-gc::integration gc_keeps_indirect_auto_root
       >         PASS [  17.126s] (2503/2515) harmonia-store-gc::integration gc_keep_recent_pins_recently_registered
       >         PASS [  17.144s] (2504/2515) harmonia-store-gc::integration gc_dry_run_does_not_delete
       >         PASS [  17.149s] (2505/2515) harmonia-store-gc::integration gc_does_not_hang_on_tmp_fifo
       >         PASS [  17.143s] (2506/2515) harmonia-store-gc::integration gc_ignores_invalid_store_basenames
       >         PASS [  17.148s] (2507/2515) harmonia-store-gc::integration gc_drops_partial_temp_root
       >         PASS [  17.335s] (2508/2515) harmonia-store-gc::integration gc_keeps_deriver_of_alive_path
       >         PASS [  17.530s] (2509/2515) harmonia-store-gc::integration gc_store_dir_trailing_slash_is_normalized
       >         PASS [  17.960s] (2510/2515) harmonia-store-gc::integration gc_runtime_roots_validated_against_db
       >         PASS [  17.992s] (2511/2515) harmonia-store-gc::integration gc_keeps_ca_output_via_build_trace
       >         PASS [  18.029s] (2512/2515) harmonia-store-gc::integration gc_cleans_unused_links_only_when_not_dry_run
       >         PASS [  25.736s] (2513/2515) harmonia-cache::retry test_download_retry_over_flaky_connection
       >         PASS [  43.298s] (2514/2515) harmonia-store-gc::integration gc_vacuums_db_after_mass_deletion
       >         PASS [  53.097s] (2515/2515) harmonia-protocol wire_roundtrip::roundtrip_query_missing_result
       > ────────────
       >      Summary [  55.733s] 2515 tests run: 2513 passed (54 leaky), 2 failed, 0 skipped
       >         FAIL [   0.146s] (2416/2515) harmonia-store-derivation::json_upstream derived_path::test_derived_path_built::to_json
       >         FAIL [   0.195s] (2418/2515) harmonia-store-derivation::json_upstream derived_path::test_derived_path_built::from_json
       > error: test run failed
       For full logs, run:
         nix log /nix/store/7jig3jkxks17gz6kywr01vy1kwdz2i9k-harmonia-llvm-cov-3.3.0.drv