these 5 derivations will be built:
  /nix/store/p59ph7ka77p98sxh29l33001cfjn7n0h-dummy.rs.drv
  /nix/store/zyjnlzqcnd92lc078d39yk200mkx5j2c-horae-deps-main.rs.drv
  /nix/store/zsnkhbyr896srpc4pr5bk9j7v4cmk6q7-source.drv
  /nix/store/zg4z642nqk63pq6n14y09m593ddd9pjh-horae-deps-0.1.0.drv
  /nix/store/kbcjfvxwv8cparvp5490dhanllafz3c0-horae-0.1.0.drv
this path will be fetched (0.0 KiB download, 4.9 KiB unpacked):
  /nix/store/1m3k32lrawa8yv7g2nvz36lzv1cjg7n4-Cargo.toml