nixpkgs/nixos/doc/manual/configuration/package-mgmt.xml
2019-09-18 22:13:35 +02:00

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<chapter 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-package-management">
<title>Package Management</title>
<para>
This section describes how to add additional packages to your system. NixOS has two distinct styles of package management:
<itemizedlist>
<listitem>
<para>
<emphasis>Declarative</emphasis>, where you declare what packages you want in your <filename>configuration.nix</filename>. Every time you run <command>nixos-rebuild</command>, NixOS will ensure that you get a consistent set of binaries corresponding to your specification.
</para>
</listitem>
<listitem>
<para>
<emphasis>Ad hoc</emphasis>, where you install, upgrade and uninstall packages via the <command>nix-env</command> command. This style allows mixing packages from different Nixpkgs versions. Its the only choice for non-root users.
</para>
</listitem>
</itemizedlist>
</para>
<xi:include href="declarative-packages.xml" />
<xi:include href="ad-hoc-packages.xml" />
</chapter>