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Newbie: How to transfer built binaries between Guix systems in the same

From: Rodrigo Morales
Subject: Newbie: How to transfer built binaries between Guix systems in the same LAN network?
Date: Sun, 2 Apr 2023 23:38:37 +0000

Table of Contents

1. The context
2. The question
3. Additional information

Newbie: How to transfer built packages from one system from another?

1 The context

  I have two systems in the same LAN network: system A and system
  B. System A has much better computational resources than system B. I
  installed a package in system A, the build stage lasted around 2
  hours. I don't want to do the build stage again in system B because
  that would require much more time.

  I haven't modified any compilation flags and both systems are using
  the same architecture, so I suspect that the build stage might yield
  the same result (unless my limited knowledge makes me not consider
  some aspects that are dependent on each systems' configuration and
  make transfer impossible).

  I came up with this question when I remembered that the installation
  step asked me whether I desired to enable "Substitute server
  discovery" (complete prompt shown in the code block below), so I
  thought that it might be possible to do the same between two Guix

        --- [Substitute server discovery] ---

        By turning this option on, you allow Guix to fetch
        subtitutes (pre-built binaries) during installation from
        servers discovered on your local area network (LAN) in
        addition to the official server. This can increase
        download throughput.

        There are no security risks: only genuine subtitutes may
        be retrieved from these servers. However, eavesdroppers on
        your LAN may be able to see what software you are

        [Enable] [Disable]

2 The question

  Is it possible to transfer already pre-built binaries between two Guix
  systems that exist in the same LAN network?

3 Additional information

  Initially, I assumed this was the default behavior. However, I
  successfully installed a package in system A, then I tried to install
  the same package in system B, but the build stage still started in
  system B.

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