nixos/doc: suggest checking options for declarative package mgmt

Some programs might not work without systemd services registered or do not work at full capacity without NixOS module.
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Jan Tojnar 2020-01-18 02:17:36 +01:00
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@ -19,6 +19,12 @@
<command>nixos-rebuild switch</command>.
</para>
<note>
<para>
Some packages require additional global configuration such as D-Bus or systemd service registration so adding them to <xref linkend="opt-environment.systemPackages"/> might not be sufficient. You are advised to check the <link xlink:href="#ch-options">list of options</link> whether a NixOS module for the package does not exist.
</para>
</note>
<para>
You can get a list of the available packages as follows:
<screen>