these 8 derivations will be built:
  /nix/store/r8ci1rw6axwai8d2i8pr2jx6s729lnm7-nixos-26.11.20260817.f4b6996.drv
  /nix/store/lcjw0shzpqgb800v8ncbjzcmqzgkjsk9-unit-script-nix-channel-init-start.drv
  /nix/store/j0d1w1yzjkldkrvbrgp87854pxxc1ixd-unit-nix-channel-init.service.drv
  /nix/store/4alnrqz5z2rjq3zbfvzp1i3jw45inhw3-system-units.drv
  /nix/store/y4nmfp7nhpr7qjwa3fy615snq1wlbaw7-etc-nix-registry.json.drv
  /nix/store/yn48r4p0nnw013vr1lfbgs68qynnif2i-etc.drv
  /nix/store/xp5rvdg2fqw4za0fqm6hgvq12i2bwlx3-activate.drv
  /nix/store/cgkn5zmfl7wvcirp1hb893k7vbjij5rm-nixos-system-flash-installer-26.11.20260817.f4b6996.drv

post-build step Upload to niks3: ok
time=2026-08-17T15:07:56.210Z level=INFO msg="Uploading 1 paths to niks3.clan.lol (780 already cached)"
time=2026-08-17T15:07:56.210Z level=INFO msg="Uploading 3fglixwnqss0lsv23xh8365rgmb0bai4-nixos-26.11.20260817.f4b6996 (202.5MB)"
time=2026-08-17T15:07:58.162Z level=WARN msg="Request returned retryable status, retrying" attempt=1 max_attempts=6 backoff=100ms status=500 url="https://s3.eu-central-003.backblazeb2.com/clan-cache-geninf/nar/0h7w698kilb395swdw8i6sl1kki5mhbvrxf4syfcfc41sab42q05.nar.zst?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=003eaae730241090000000009%2F20260817%2Feu-central-003%2Fs3%2Faws4_request&X-Amz-Date=20260817T150756Z&X-Amz-Expires=18000&X-Amz-SignedHeaders=host&partNumber=1&uploadId=4_zde3ada9ec793c07294f10019_f2524da75317d3412_d20260817_m150756_c003_v0312041_t0054_u01786979276197&X-Amz-Signature=eeaddcefafb5bbdeab7dbaebe115d4ebe0d79967de4b4823040d3575cbc4eeca"
time=2026-08-17T15:08:00.362Z level=ERROR msg="Failed to close zstd encoder" error="io: read/write on closed pipe"
time=2026-08-17T15:08:00.364Z level=INFO msg="Uploading 23 narinfos"
time=2026-08-17T15:08:06.188Z level=WARN msg="Request returned retryable status, retrying" attempt=1 max_attempts=6 backoff=100ms status=500 url="https://s3.eu-central-003.backblazeb2.com/clan-cache-geninf/d8gdbrypk96njdkg5lpwb893js72xxqv.narinfo?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=003eaae730241090000000009%2F20260817%2Feu-central-003%2Fs3%2Faws4_request&X-Amz-Date=20260817T150756Z&X-Amz-Expires=18000&X-Amz-SignedHeaders=host&X-Amz-Signature=78a5a508149296f4bb0e9f2cf0e37a5420f1a7f8f29ffad41c7d96450a2f4ce3"
time=2026-08-17T15:08:11.172Z level=WARN msg="Request returned retryable status, retrying" attempt=1 max_attempts=6 backoff=100ms status=500 url="https://s3.eu-central-003.backblazeb2.com/clan-cache-geninf/nz56wc6601hqyxm8cjq8nlqh9k9qhw9w.narinfo?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=003eaae730241090000000009%2F20260817%2Feu-central-003%2Fs3%2Faws4_request&X-Amz-Date=20260817T150756Z&X-Amz-Expires=18000&X-Amz-SignedHeaders=host&X-Amz-Signature=efff0da0e2f395d4571cf5d76c9c2ea7eaf35047ca59799bd2ec6daf08b76c01"
time=2026-08-17T15:08:11.714Z level=INFO msg="Upload complete. (15.762s)"