this derivation will be built:
  /nix/store/fh7mbfhb43yxy41k7ghf24z8m81a8hng-harmonia-llvm-cov-3.2.0.drv
error: Cannot build '/nix/store/fh7mbfhb43yxy41k7ghf24z8m81a8hng-harmonia-llvm-cov-3.2.0.drv'.
       Reason: builder failed with exit code 100.
       Output paths:
         /nix/store/kb76vhkd84lzqki00mgnj4ccxni18gyg-harmonia-llvm-cov-3.2.0
       Last 25 log lines:
       >         FAIL [   1.694s] (2334/2375) harmonia-store-gc::integration gc_keeps_transitive_closure
       >         FAIL [   1.740s] (2335/2375) harmonia-store-gc::integration gc_socket_root_mid_gc_keeps_path_and_deletes_rest
       >         FAIL [   1.886s] (2336/2375) harmonia-store-gc::integration gc_does_not_hang_on_tmp_fifo
       >         FAIL [   1.904s] (2337/2375) harmonia-store-gc::integration gc_scans_roots_despite_unfollowable_indirect_target
       >         FAIL [   1.962s] (2339/2375) harmonia-store-gc::integration gc_keeps_lock_file_of_active_build
       >         FAIL [   1.998s] (2340/2375) harmonia-store-gc::integration gc_deletes_drv_when_output_deriver_is_unset
       >         FAIL [   2.008s] (2341/2375) harmonia-store-gc::integration gc_deletes_unreferenced_paths
       >         FAIL [   2.033s] (2342/2375) harmonia-store-gc::integration gc_keeps_ca_outputs_of_alive_drv
       >         FAIL [   2.090s] (2344/2375) harmonia-store-gc::integration gc_deletes_non_utf8_store_entry
       >         FAIL [   2.095s] (2345/2375) harmonia-store-gc::integration gc_keeps_temp_root_not_yet_in_db
       >         FAIL [   2.113s] (2346/2375) harmonia-store-gc::integration gc_removes_unknown_disk_entries
       >         FAIL [   2.305s] (2347/2375) harmonia-store-gc::integration gc_keeps_indirect_auto_root
       >         FAIL [   2.326s] (2348/2375) harmonia-store-gc::integration gc_ignores_invalid_store_basenames
       >         FAIL [   2.351s] (2349/2375) harmonia-store-gc::integration gc_chunk_size_one_deletes_whole_dead_chain
       >         FAIL [   2.385s] (2350/2375) harmonia-store-gc::integration gc_removes_unlocked_tmp_dir
       >         FAIL [   2.459s] (2351/2375) harmonia-store-gc::integration gc_keeps_deriver_of_alive_path
       >         FAIL [   2.573s] (2353/2375) harmonia-store-gc::integration gc_runtime_roots_validated_against_db
       >         FAIL [   2.676s] (2355/2375) harmonia-store-gc::integration gc_removes_dangling_auto_root
       >         FAIL [   2.985s] (2357/2375) harmonia-store-gc::integration gc_deletes_readonly_paths
       >         FAIL [   3.209s] (2359/2375) harmonia-store-gc::integration gc_max_freed_batches_by_estimated_size
       >         FAIL [   3.530s] (2360/2375) harmonia-store-gc::integration gc_rebases_canonical_runtime_roots_to_logical_store
       >         FAIL [   3.539s] (2361/2375) harmonia-store-gc::integration gc_skips_locked_tmp_dir
       >         FAIL [   3.679s] (2362/2375) harmonia-store-gc::integration gc_empty_store_is_noop
       >         FAIL [   3.721s] (2365/2375) harmonia-store-gc::integration gc_drops_partial_temp_root
       > error: test run failed
       For full logs, run:
         nix log /nix/store/fh7mbfhb43yxy41k7ghf24z8m81a8hng-harmonia-llvm-cov-3.2.0.drv