this derivation will be built:
  /nix/store/dpwzvcwk4iy3rlnww5y6agfyb312a5c2-niks3-go-unit-tests.drv
error: Cannot build '/nix/store/dpwzvcwk4iy3rlnww5y6agfyb312a5c2-niks3-go-unit-tests.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/sj0g7w6dx6wyh2j89v42xjzxfrnrz57f-niks3-go-unit-tests
       Last 25 log lines:
       > 2026/10/07 06:19:16 ERROR Upload failed error="upload failed" count=1
       > 2026/10/07 06:19:16 ERROR Drain finished with paths left in queue remaining=1
       > --- PASS: TestDrainGivesUpWhenServerDown (0.01s)
       > --- PASS: TestDrainIsolatesPoisonPath (0.01s)
       > --- PASS: TestWorkerUploadsAndRemoves (0.03s)
       > --- PASS: TestWorkerPrunesClosureDeps (0.03s)
       > --- PASS: TestWorkerSkipsGCdPaths (0.03s)
       > --- PASS: TestQueueRemoveLargeClosure (0.04s)
       > --- PASS: TestQueueConcurrentWriters (0.16s)
       > 2026/10/07 06:19:16 ERROR Upload failed error="context deadline exceeded" count=2
       > 2026/10/07 06:19:16 ERROR Drain finished with paths left in queue remaining=4
       > --- PASS: TestDrainTimeout (0.21s)
       > 2026/10/07 06:19:17 INFO Uploading batch count=1
       > 2026/10/07 06:19:17 INFO Uploading batch count=1
       > 2026/10/07 06:19:17 INFO Uploading batch count=1
       > 2026/10/07 06:19:17 ERROR Upload failed error="upload failed" count=1
       > 2026/10/07 06:19:17 INFO Uploading batch count=1
       > 2026/10/07 06:19:17 ERROR Upload failed error="upload failed" count=1
       > 2026/10/07 06:19:17 INFO Uploading batch count=1
       > 2026/10/07 06:19:17 ERROR Upload failed error="upload failed" count=1
       > 2026/10/07 06:19:17 INFO Uploading batch count=1
       > 2026/10/07 06:19:17 ERROR Upload failed error="upload failed" count=1
       > 2026/10/07 06:19:17 ERROR Drain finished with paths left in queue remaining=1
       > --- PASS: TestRunNotBlockedByPoisonHead (1.04s)
       > FAIL
       For full logs, run:
         nix log /nix/store/dpwzvcwk4iy3rlnww5y6agfyb312a5c2-niks3-go-unit-tests.drv