Nix Hello World

This is just a simple program to experience on Nix derivation/packages.

Build or Install in Nix Environment

Build

To build this program by Nix, clone or download this project and run the following command at the root directory of the project:

nix-build

or the long version by specifying the file: nix-build default.nix, or even doing instantiate and realise step-by-step: nix-store -r $(nix-instantiate default.nix).

Install

To install this program in Nix Environment, run the following command at the root directory of the project:

nix-env -i -f default.nix

or the long version: nix-env --install --file default.nix.

Inspect

You can get the out path by running nix-store -q --outputs $(nix-instantiate default.nix) or nix eval '("${import ./default.nix}")' before installation, or nix-env -q --out-path --no-name hello after installing.

To see the contents of the .drv file, run: nix show-derivation $(nix-instantiate default.nix) or nix show-derivation $(nix-store -q --deriver $(nix eval '("${import ./default.nix}")' | cut -d '"' -f 1)).

Build Manually

You can build it manually with gcc by running:

gcc src/hello.c -o hello

References

• Nix Pills