Using Nix to build JavaScript/TS projects with private dependencies

Nix is a great tool for building software, especially in professional settings because of the guarantees it comes with.
For example, you can be sure that the software you build is reproducible and that it will work on any machine.

When it comes to building packages in the Nix world, you usually end up going with derivation builders already made for you.

For Rust there is rustPlatform.buildRustPackage, for Go there is go2nix, for JS/TS there is node2nix, and so on.