Garbage Collection

The exact policy for garbage collection of old builds and build inputs hasn't been settled.

For the moment, you should not make any assumptions about how long your data will be retained. Both the storage (nix store paths) and the database (build history etc) used by nixbuild.net might be emptied at any time. This should not be a major inconvenience for you as a nixbuild.net user, since nix will just re-upload dependencies as needed.