this derivation will be built:
  /nix/store/k64fvdcv4c7i1av82j0yrpg15256n0cg-interpolate-conformance.drv
warning: ignoring the client-specified setting 'store', because it is a restricted setting and you are not a trusted user
building '/nix/store/k64fvdcv4c7i1av82j0yrpg15256n0cg-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> bld1: building k64fvdcv4c7i1av82j0yrpg15256n0cg-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected