getExe uses meta.mainProgram
The nixpkgs lib function getExe uses meta.mainProgram to get a path to the executable in a package. It’s final path will then be interpolated into $out/bin/{name}.
Creating inline derivations in nix files
Sometimes one simply wants to write a quick script, or some other text file in a nix derivation.
The easiest way to achieve that is with the ‘trivial’ builders that nixpkgs has to offer.
Their descriptions in the manual
Virtual Machine tests
Nix has some cool infrastructure to test anything you can in a configuration of multiple virtual machines.
It has some warts, as the test script is written in python… But overall, it gets its job done.
