this derivation will be built:
  /nix/store/jcrblpfm13gvphbh0q9vhz1mmjzb2lzm-iets-nextest-0.1.0.drv
building '/nix/store/jcrblpfm13gvphbh0q9vhz1mmjzb2lzm-iets-nextest-0.1.0.drv'
iets-nextest-0.1.0> Running phase: unpackPhase
iets-nextest-0.1.0> unpacking source archive /nix/store/p0nawkj8dc4xgi86p451jnxas9zijhhz-source
iets-nextest-0.1.0> source root is source