these 4 derivations will be built:
  /nix/store/22q5iprjki8s0l2q6fflcbgn0b206d8w-Cargo.toml.drv
  /nix/store/985gn40w4014aw18v9yr0k5l6yvpg2lp-source.drv
  /nix/store/w6i7lsf39nkn4laywbhjnyzldl2zjx7k-harmonia-deps-3.3.0.drv
  /nix/store/af8q5yg3livn0zzqa1bsl0vv84bcihgf-harmonia-3.3.0.drv