"!doesanyoneuse"="Don't ask if anyone uses software xyz, just ask your specific question. This helps solve your problem quicker, and allows people who haven't used xyz but may still be able to help you to do so."
"!tofu"="To get a sha256 hash of a new source, you can use the Trust On First Use model: use probably-wrong hash (for example: 0000000000000000000000000000000000000000000000000000) then replace it with the correct hash Nix expected."
"!notfound"="nix-env -qaP does not show the package you are looking for but you are sure it should be there? Check out https://nixos.wiki/wiki/FAQ/notfound"