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0f40a560ca
packages (i.e., the packages that should appear in the user's $PATH, and so on). Based on this list, the script nix-populate creates a hierarchy of symlinks to the relevant files in those packages (e.g., for pkg/bin and pkg/lib). A nice property of nix-populate is that on each run it creates a *new* tree, rather than updating the old one. It then atomically switches over to the new tree. This allows atomic upgrades or rollbacks on the set of activated packages. |
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