this derivation will be built:
  /nix/store/qffdvagjg8y3b8dg1f59qwc8a9rc73n3-interpolate-conformance.drv
building '/nix/store/qffdvagjg8y3b8dg1f59qwc8a9rc73n3-interpolate-conformance.drv'
interpolate-conformance> 9 cases: Nix interpolate == Python interpolate == expected

post-build step Upload to niks3: ok
time=2026-09-01T00:49:32.044Z level=INFO msg="Uploading 0 paths to niks3.numtide.com (1 already cached)"
time=2026-09-01T00:49:32.778Z level=INFO msg="Uploading 1 narinfos"
time=2026-09-01T00:49:33.337Z level=INFO msg="Upload complete. (1.592s)"