these 2 derivations will be built:
  /nix/store/pkjb01w1a4lx1ggy6d9cag1alfa5gyvx-iets-0.1.0.drv
  /nix/store/f81cbkscxlkz6a3qh9xryi30rvzjibc0-iets-langtests.drv
error: timed out after 1200 seconds
error: Cannot build '/nix/store/f81cbkscxlkz6a3qh9xryi30rvzjibc0-iets-langtests.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/ikdywy8v7dgxxnwh2ab156lh4x06ign0-iets-langtests