these 4 derivations will be built:
  /nix/store/hkfnzsc42wrv1n7n2g2kx2w9gzqqdbrm-Cargo.toml.drv
  /nix/store/40gs402xz34i2wschadl9nil49gia6r9-source.drv
  /nix/store/xvafqn9ldxi139msbcf1rl29xsn7s0h6-iets-deps-0.2.0.drv
  /nix/store/rq4r60yxc31bj9d6x2gapc6bkhs078rh-iets-doctest-0.2.0.drv
warning: ignoring the client-specified setting 'store', because it is a restricted setting and you are not a trusted user