this derivation will be built:
  /nix/store/c0pn6hlq4nzfbyfz64f2imvf2i2b8l34-interpolate-conformance.drv
building '/nix/store/c0pn6hlq4nzfbyfz64f2imvf2i2b8l34-interpolate-conformance.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=21&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/c0pn6hlq4nzfbyfz64f2imvf2i2b8l34-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> mac02: building c0pn6hlq4nzfbyfz64f2imvf2i2b8l34-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected