these 4 derivations will be built:
  /nix/store/zy29ki1cqfp9bjxb1c8v9809pszxqwlz-darwin-openpty-shim.h.drv
  /nix/store/5c38r0vb0v5ib1sxv273i4kh1rxknmqa-darwin-openpty-hook.sh.drv
  /nix/store/msval6fwkmhl94zs7hln473czmr6pky7-darwin-openpty-hook.drv
  /nix/store/w8iq67m5347w6pr38idqp35ilwfbnixh-check-darwinOpenptyHook.drv