nixpkgs/nixos/doc/manual/configuration/declarative-packages.xml
Eelco Dolstra 2cd7c1f198 Unify NixOS and Nixpkgs channel structure
This is primarily to ensure that

  -I nixpkgs=https://nixos.org/channels/nixos-unstable/nixexprs.tar.xz

and

  -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz

and

  -I nixpkgs=https://nixos.org/channels/nixpkgs-unstable/nixexprs.tar.xz

behave consistently.

It also allows installing packages via "nix-env -iA nixos.<pkg>"
rather than "nixos.pkgs.<pkg>". It would be even better to allow
"nixpkgs.<pkg>", but that requires a change to nix-channel.

Fixes #7659.
2015-08-05 17:37:11 +02:00

44 lines
1.5 KiB
XML

<section xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude"
version="5.0"
xml:id="sec-declarative-package-mgmt">
<title>Declarative Package Management</title>
<para>With declarative package management, you specify which packages
you want on your system by setting the option
<option>environment.systemPackages</option>. For instance, adding the
following line to <filename>configuration.nix</filename> enables the
Mozilla Thunderbird email application:
<programlisting>
environment.systemPackages = [ pkgs.thunderbird ];
</programlisting>
The effect of this specification is that the Thunderbird package from
Nixpkgs will be built or downloaded as part of the system when you run
<command>nixos-rebuild switch</command>.</para>
<para>You can get a list of the available packages as follows:
<screen>
$ nix-env -qaP '*' --description
nixos.firefox firefox-23.0 Mozilla Firefox - the browser, reloaded
<replaceable>...</replaceable>
</screen>
The first column in the output is the <emphasis>attribute
name</emphasis>, such as
<literal>nixos.thunderbird</literal>. (The
<literal>nixos</literal> prefix allows distinguishing between
different channels that you might have.)</para>
<para>To “uninstall” a package, simply remove it from
<option>environment.systemPackages</option> and run
<command>nixos-rebuild switch</command>.</para>
<xi:include href="customizing-packages.xml" />
<xi:include href="adding-custom-packages.xml" />
</section>