Fix multi-user installation with a symlinked store #4022
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Installing Nix with a symlinked store is not recommended, but is nevertheless
supported according to the documentation.
However, even when setting
NIX_IGNORE_SYMLINK_STORE=1
, installation still failswith the following error:
This is because sudo does not preserve environment variables and so the environment variable
NIX_IGNORE_SYMLINK_STORE
will always be undefined when evaluated bynix-store
.This change makes sudo preserve the relevant environment variable in order to make installation
work again.