this derivation will be built:
  /nix/store/4jgp4l5lnhsjggzwdny5kvn2aw0qlr6g-amp-0.0.1786809683-g406e31.drv

post-build step Upload to niks3: ok
time=2026-08-15T18:13:54.411Z level=INFO msg="Uploading 1 paths to niks3.numtide.com (9 already cached)"
time=2026-08-15T18:13:54.412Z level=INFO msg="Uploading 5c0f115n1ivbrcdvsig9j5xds1abg7bv-amp-0.0.1786809683-g406e31 (102.2MB)"
time=2026-08-15T18:13:57.046Z level=ERROR msg="Failed to close zstd encoder" error="io: read/write on closed pipe"
time=2026-08-15T18:13:57.047Z level=INFO msg="Uploading 1 narinfos"
time=2026-08-15T18:13:57.360Z level=INFO msg="Upload complete. (3.23s)"