nrabulinski/lix
0
0
Fork 0
forked from lix-project/lix
Code Pull requests Activity
lix/doc/manual/src/expressions/simple-expression.md
Eelco Dolstra ef606760ab
Pandoc conversion
2020-07-23 18:26:48 +02:00

1 KiB
Raw Blame History

A Simple Nix Expression

This section shows how to add and test the GNU Hello package to the Nix Packages collection. Hello is a program that prints out the text “Hello, world!”.

To add a package to the Nix Packages collection, you generally need to do three things:

  1. Write a Nix expression for the package. This is a file that describes all the inputs involved in building the package, such as dependencies, sources, and so on.

  2. Write a builder. This is a shell script[1] that actually builds the package from the inputs.

  3. Add the package to the file pkgs/top-level/all-packages.nix. The Nix expression written in the first step is a function; it requires other packages in order to build it. In this step you put it all together, i.e., you call the function with the right arguments to build the actual package.

  1. In fact, it can be written in any language, but typically it's a bash shell script.