bug#44437: Best way to install package in Guix System

[Tobias Geerinckx-Rice]

Musics,

musics--- via Bug reports for GNU Guix 写道：
> "guix install network-manager-openvpn" then "guix pull" and then
> "sudo guix system reconfigure /etc/config.scm"

‘guix pull’ updates the versions of packages that are *available* 
(guix package --list-available), but does not update any packages 
currently *installed* on your system.  For example:

 $ guix package --list-available=icecat
 icecat 78.3.0-guix0-preview1   ...

 $ guix install icecat

 $ icecat --version
 GNU IceCat 78.3.0esr

 $ guix pull

 $ guix package --list-available=icecat
 icecat 78.4.1-guix0-preview1   ...

 $ icecat --version
 GNU IceCat 78.3.0esr

 $ guix upgrade icecat # or guix install icecat

 $ icecat --version
 GNU IceCat 78.4.1esr

Kind regards,

T G-R

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