It literally isn't. There's are at least three novel syntax concepts in there, and even if you just presented the resulting JSON data, there is still a huge amount of knowledge you need to know what Nix will do with that data.
novel syntax concepts? like semicolons and lambda functions?
> know what Nix will do
you would also need a lot of time to understand what exactly happens in uv/cargo/npm/apt under the hood. if this is all that matters, you should just carry binaries on a thumb drive