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authorgithub-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>2023-10-20 18:00:54 +0000
committerGitHub <noreply@github.com>2023-10-20 18:00:54 +0000
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Merge master into staging-next
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diff --git a/nixos/doc/manual/development/what-happens-during-a-system-switch.chapter.md b/nixos/doc/manual/development/what-happens-during-a-system-switch.chapter.md
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--- a/nixos/doc/manual/development/what-happens-during-a-system-switch.chapter.md
+++ b/nixos/doc/manual/development/what-happens-during-a-system-switch.chapter.md
@@ -44,6 +44,10 @@ of actions is always the same:
 - Inspect what changed during these actions and print units that failed and
   that were newly started
 
+By default, some units are filtered from the outputs to make it less spammy.
+This can be disabled for development or testing by setting the environment variable
+`STC_DISPLAY_ALL_UNITS=1`
+
 Most of these actions are either self-explaining but some of them have to do
 with our units or the activation script. For this reason, these topics are
 explained in the next sections.