Sad that in that front page, there is no one reference to Nix.

They should at least give credit.

There used to be something on the front page, but the result was that too many people thought it was just a nix language replacement when it really was its own implementation of the packaging model that nix pioneered. The Guix documentation gives full credit to nix where it is due. The founder of the project spent years contributing to nix.