75 lines
1.9 KiB
Markdown
75 lines
1.9 KiB
Markdown
|
# Adding Custom Packages {#sec-custom-packages}
|
||
|
|
|
||
|
|
It's possible that a package you need is not available in NixOS. In that
|
||
|
|
case, you can do two things. First, you can clone the Nixpkgs
|
||
|
|
repository, add the package to your clone, and (optionally) submit a
|
||
|
|
patch or pull request to have it accepted into the main Nixpkgs repository.
|
||
|
|
This is described in detail in the [Nixpkgs manual](https://nixos.org/nixpkgs/manual).
|
||
|
|
In short, you clone Nixpkgs:
|
||
|
|
|
||
|
|
```ShellSession
|
||
|
|
$ git clone https://github.com/NixOS/nixpkgs
|
||
|
|
$ cd nixpkgs
|
||
|
|
```
|
||
|
|
|
||
|
|
Then you write and test the package as described in the Nixpkgs manual.
|
||
|
|
Finally, you add it to [](#opt-environment.systemPackages), e.g.
|
||
|
|
|
||
|
|
```nix
|
||
|
|
environment.systemPackages = [ pkgs.my-package ];
|
||
|
|
```
|
||
|
|
|
||
|
|
and you run `nixos-rebuild`, specifying your own Nixpkgs tree:
|
||
|
|
|
||
|
|
```ShellSession
|
||
|
|
# nixos-rebuild switch -I nixpkgs=/path/to/my/nixpkgs
|
||
|
|
```
|
||
|
|
|
||
|
|
The second possibility is to add the package outside of the Nixpkgs
|
||
|
|
tree. For instance, here is how you specify a build of the
|
||
|
|
[GNU Hello](https://www.gnu.org/software/hello/) package directly in
|
||
|
|
`configuration.nix`:
|
||
|
|
|
||
|
|
```nix
|
||
|
|
environment.systemPackages =
|
||
|
|
let
|
||
|
|
my-hello = with pkgs; stdenv.mkDerivation rec {
|
||
|
|
name = "hello-2.8";
|
||
|
|
src = fetchurl {
|
||
|
|
url = "mirror://gnu/hello/${name}.tar.gz";
|
||
|
|
sha256 = "0wqd8sjmxfskrflaxywc7gqw7sfawrfvdxd9skxawzfgyy0pzdz6";
|
||
|
|
};
|
||
|
|
};
|
||
|
|
in
|
||
|
|
[ my-hello ];
|
||
|
|
```
|
||
|
|
|
||
|
|
Of course, you can also move the definition of `my-hello` into a
|
||
|
|
separate Nix expression, e.g.
|
||
|
|
|
||
|
|
```nix
|
||
|
|
environment.systemPackages = [ (import ./my-hello.nix) ];
|
||
|
|
```
|
||
|
|
|
||
|
|
where `my-hello.nix` contains:
|
||
|
|
|
||
|
|
```nix
|
||
|
|
with import <nixpkgs> {}; # bring all of Nixpkgs into scope
|
||
|
|
|
||
|
|
stdenv.mkDerivation rec {
|
||
|
|
name = "hello-2.8";
|
||
|
|
src = fetchurl {
|
||
|
|
url = "mirror://gnu/hello/${name}.tar.gz";
|
||
|
|
sha256 = "0wqd8sjmxfskrflaxywc7gqw7sfawrfvdxd9skxawzfgyy0pzdz6";
|
||
|
|
};
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
This allows testing the package easily:
|
||
|
|
|
||
|
|
```ShellSession
|
||
|
|
$ nix-build my-hello.nix
|
||
|
|
$ ./result/bin/hello
|
||
|
|
Hello, world!
|
||
|
|
```
|