Release 0.14 (2010-02-04)
This release has the following improvements:
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The garbage collector now starts deleting garbage much faster than before. It no longer determines liveness of all paths in the store, but does so on demand. 
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Added a new operation, nix-store --query --roots, that shows the garbage collector roots that directly or indirectly point to the given store paths.
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Removed support for converting Berkeley DB-based Nix databases to the new schema. 
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Removed the --use-atimeand--max-atimegarbage collector options. They were not very useful in practice.
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On Windows, Nix now requires Cygwin 1.7.x. 
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A few bug fixes.