From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jone <yeger9@gmail.com>
Subject: Install new package in current generation?
Date: Wed, 23 May 2018 00:44:41 +0000
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Now:

guix package -i PACKAGE  # -> creating new generation
guix package -d          # remove all generations, except current
guix gc

- not so good: first creating new generation, and next delete all
others (I absolutely do not need a rollback).

Maybe some other way?