these 4 derivations will be built:
  /nix/store/bpy39bxdv9s8071szha0qc7pyjnfrsf2-etc-nix-registry.json.drv
  /nix/store/lq250awk6zw50350d4s9qg1787723b4v-etc.drv
  /nix/store/wd8ky7z8zq35ygfkniqap9bvw9qqlxcf-activate.drv
  /nix/store/014493b7bkinlk0npnpljskd2jd8m91m-nixos-system-cask-26.11.20260727.fc72407.drv
building '/nix/store/lq250awk6zw50350d4s9qg1787723b4v-etc.drv'
building '/nix/store/wd8ky7z8zq35ygfkniqap9bvw9qqlxcf-activate.drv'
building '/nix/store/014493b7bkinlk0npnpljskd2jd8m91m-nixos-system-cask-26.11.20260727.fc72407.drv'
nixos-system-cask-26.11.20260727.fc72407> structuredAttrs is enabled

post-build step Route build to niks3: failed
Pushing mulatta/dots to https://niks3.mulatta.io
time=2026-09-04T21:17:40.806+09:00 level=WARN msg="Request failed, retrying" attempt=1 max_attempts=6 backoff=100ms error="Get \"https://niks3.mulatta.io/api/cache-config\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/cache-config
time=2026-09-04T21:17:40.912+09:00 level=WARN msg="Request failed, retrying" attempt=2 max_attempts=6 backoff=191.133363ms error="Get \"https://niks3.mulatta.io/api/cache-config\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/cache-config
time=2026-09-04T21:17:41.108+09:00 level=WARN msg="Request failed, retrying" attempt=3 max_attempts=6 backoff=392.937995ms error="Get \"https://niks3.mulatta.io/api/cache-config\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/cache-config
time=2026-09-04T21:17:41.506+09:00 level=WARN msg="Request failed, retrying" attempt=4 max_attempts=6 backoff=726.042625ms error="Get \"https://niks3.mulatta.io/api/cache-config\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/cache-config
time=2026-09-04T21:17:42.237+09:00 level=WARN msg="Request failed, retrying" attempt=5 max_attempts=6 backoff=1.491125878s error="Get \"https://niks3.mulatta.io/api/cache-config\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/cache-config
time=2026-09-04T21:17:43.734+09:00 level=WARN msg="Failed to fetch cache config, uploading without size limit" error="fetching cache config: sending request: request failed after retries: Get \"https://niks3.mulatta.io/api/cache-config\": dial tcp 64.176.225.253:443: connect: connection refused"
time=2026-09-04T21:17:43.791+09:00 level=WARN msg="Request failed, retrying" attempt=1 max_attempts=6 backoff=100ms error="Post \"https://niks3.mulatta.io/api/pending_closures\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/pending_closures
time=2026-09-04T21:17:43.896+09:00 level=WARN msg="Request failed, retrying" attempt=2 max_attempts=6 backoff=213.865034ms error="Post \"https://niks3.mulatta.io/api/pending_closures\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/pending_closures
time=2026-09-04T21:17:44.115+09:00 level=WARN msg="Request failed, retrying" attempt=3 max_attempts=6 backoff=362.722681ms error="Post \"https://niks3.mulatta.io/api/pending_closures\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/pending_closures
time=2026-09-04T21:17:44.483+09:00 level=WARN msg="Request failed, retrying" attempt=4 max_attempts=6 backoff=816.842585ms error="Post \"https://niks3.mulatta.io/api/pending_closures\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/pending_closures
time=2026-09-04T21:17:45.305+09:00 level=WARN msg="Request failed, retrying" attempt=5 max_attempts=6 backoff=1.671036769s error="Post \"https://niks3.mulatta.io/api/pending_closures\": dial tcp 64.176.225.253:443: connect: connection refused" url=https://niks3.mulatta.io/api/pending_closures
time=2026-09-04T21:17:46.984+09:00 level=ERROR msg="Fatal error" error="pushing paths: creating pending closures: creating pending closure: sending request: request failed after retries: Post \"https://niks3.mulatta.io/api/pending_closures\": dial tcp 64.176.225.253:443: connect: connection refused"