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If automatic store optimisation is enabled, and a hard-linked file in the store gets corrupted, then the corresponding .links entry will also be corrupted. In that case, trying to repair with --repair or --repair-path won't work, because the new "good" file will be replaced by a hard link to the corrupted file. We can catch most of these cases by doing a sanity-check on the file sizes.
Nix is a purely functional package manager. For installation and usage instructions, please read the manual, which can be found in `docs/manual/manual.html', and additionally at the Nix website at <http://nixos.org/>. Acknowledgments This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http://www.OpenSSL.org/).