these 2 derivations will be built:
  /nix/store/mnydl2dvhi3rvbfdn378l2mgcwf3sndq-iets-0.1.0.drv
  /nix/store/k99lzkzx3hwv33m8l176l3m4xb07rsy7-iets-partest.drv
building '/nix/store/k99lzkzx3hwv33m8l176l3m4xb07rsy7-iets-partest.drv'
iets-partest> note: no nix-instantiate on PATH; comparing worker counts only
iets-partest> ok   shared-graph (rc=0)
iets-partest> ok   deep-attrs (rc=0)
iets-partest> ok   cycle (rc=1)
iets-partest> ok   cycle-two-ranges (rc=1)
iets-partest> ok   cycle-deep (rc=1)
iets-partest> ok   error-elem (rc=1)
iets-partest> ok   try-eval (rc=0)