these 2 derivations will be built:
  /nix/store/x9ylbrwx13m9kqnq7s7ys34ixbcnmnmq-niks3-tests-1.15.0.drv
  /nix/store/x6qqgvmd9vizipyhsanw7nlpm7z2m7cy-niks3-go-unit-tests.drv
error: Cannot build '/nix/store/x6qqgvmd9vizipyhsanw7nlpm7z2m7cy-niks3-go-unit-tests.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/pd91a02s5wavssc568xar0yic319jdvf-niks3-go-unit-tests
       Last 25 log lines:
       > --- FAIL: TestRegisterUploadedObject_BoundedAgainstSilentServer (0.36s)
       > 2026/10/11 04:52:57 WARN Request returned retryable status, retrying attempt=12 backoff=1ms status=502 url=http://127.0.0.1:37991
       > 2026/10/11 04:52:57 WARN Request returned retryable status, retrying attempt=13 backoff=1ms status=502 url=http://127.0.0.1:37991
       > 2026/10/11 04:52:57 WARN Request returned retryable status, retrying attempt=14 backoff=1ms status=502 url=http://127.0.0.1:37991
       > --- PASS: TestRegisterUploadedObjectReusesConnections (0.36s)
       > 2026/10/11 04:52:57 WARN Request returned retryable status, retrying attempt=15 backoff=1ms status=502 url=http://127.0.0.1:37991
       > 2026/10/11 04:52:57 WARN Request returned retryable status, retrying attempt=16 backoff=1ms status=502 url=http://127.0.0.1:37991
       > 2026/10/11 04:52:57 WARN Request returned retryable status, retrying attempt=17 backoff=1ms status=502 url=http://127.0.0.1:37991
       > --- PASS: TestRetryTimeoutOutlastsMaxRetries (0.37s)
       > --- PASS: TestDumpPathWriterError (0.39s)
       > 2026/10/11 04:52:57 INFO Uploading abc-hello (1.0GB)
       > 2026/10/11 04:52:57 WARN Request failed, retrying attempt=1 backoff=100ms error="Put \"http://127.0.0.1:41229/part/2\": uploading part 1: server returned 404: no such upload\n" url=http://127.0.0.1:41229/part/2
       > --- PASS: TestDumpPathMatchesNix (0.41s)
       > 2026/10/11 04:52:57 WARN Request failed, retrying attempt=1 backoff=100ms error="Put \"http://127.0.0.1:41229/part/3\": uploading part 1: server returned 404: no such upload\n" url=http://127.0.0.1:41229/part/3
       > 2026/10/11 04:52:57 WARN Request failed, retrying attempt=1 backoff=100ms error="Put \"http://127.0.0.1:41229/part/4\": uploading part 1: server returned 404: no such upload\n" url=http://127.0.0.1:41229/part/4
       > 2026/10/11 04:52:57 WARN Request failed, retrying attempt=1 backoff=100ms error="Put \"http://127.0.0.1:41229/part/5\": uploading part 1: server returned 404: no such upload\n" url=http://127.0.0.1:41229/part/5
       > 2026/10/11 04:52:57 WARN Request failed, retrying attempt=1 backoff=100ms error="Put \"http://127.0.0.1:41229/part/6\": uploading part 1: server returned 404: no such upload\n" url=http://127.0.0.1:41229/part/6
       > 2026/10/11 04:52:57 ERROR Failed to close zstd encoder error="io: read/write on closed pipe"
       > --- PASS: TestSupersededNARStillUploadsListing (0.00s)
       >     --- PASS: TestSupersededNARStillUploadsListing/listing_upload_fails (0.29s)
       >     --- PASS: TestSupersededNARStillUploadsListing/small_NAR (0.30s)
       >     --- PASS: TestSupersededNARStillUploadsListing/dump_cut_short (0.85s)
       > --- PASS: TestUploadMultipart_PartsInParallel (0.96s)
       > --- PASS: TestRateLimiterFeedback_400DoesNotCountAsSuccess (1.12s)
       > FAIL
       For full logs, run:
         nix log /nix/store/x6qqgvmd9vizipyhsanw7nlpm7z2m7cy-niks3-go-unit-tests.drv