these 3 derivations will be built:
  /nix/store/82di9p0x1s0kddvzqxzv8z53lrvjv6vh-source.drv
  /nix/store/64csnny6kc4cn4xqms689bc8qgrq2myn-deja-vu-0.24.1.drv
  /nix/store/2r8dvglz7av34zxkz6i8lqvq6h4bsgwx-check-deja-vu.drv