these 4 derivations will be built:
  /nix/store/jz589mqrsnrnmzjjhh9ykhdsicnmg6r2-Cargo.toml.drv
  /nix/store/g8b8q1rdib183br4mval0gnqsik6ar0n-source.drv
  /nix/store/fxzvnscq5jfi5ipwawnjhlimnx07ngfs-iets-deps-0.2.0.drv
  /nix/store/zlknnranz2230lrgr4j5ldlxjrxhivmg-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