nix-store --dump-db - export Nix database
nix-store --dump-db [paths…]
The operation --dump-db writes a dump of the Nix database to standard
output. It can be loaded into an empty Nix store using --load-db. This
is useful for making backups and when migrating to different database
schemas.
By default, --dump-db will dump the entire Nix database. When one or
more store paths is passed, only the subset of the Nix database for
those store paths is dumped. As with --export, the user is responsible
for passing all the store paths for a closure. See --export for an
example.
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