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  `--isvalid' flag in nix-store.

  (but substitutable) referers.

  database isn't always in the manifest (so the reference graph cannot
  be reconstructed fully).

  options were documented, as well as the Nix configuration file.

  any store path).

  copy them, but use them directly.

  derivations.  This is mostly to simplify the implementation of
  nix-prefetch-{url, svn}, which now work properly in setuid
  installations.

* Enforce valid store names in `nix-store --add / --add-fixed'.

* nix-store options.

  by Rob).

  separately from Nix or Nixpkgs.