these 3 derivations will be built:
  /nix/store/08p49mhhmbycdr1wyz95vwk4w3i9iap8-source.drv
  /nix/store/1j08n3i0b0apkyqfwmzj1739r1458v5r-hax-0.7.0.drv
  /nix/store/9bzy4brdsdxq9nhzqiw7w8il7rvfz12n-check-hax.drv