Latest upstream release: 0.5.6
Current version in Fedora Rawhide: 0.4.1
Please consult the package update guidelines before you issue an update to a stable branch: https://fedoraproject.org/wiki/Package_update_guidelines
More information about the service that created this bug can be found at:
current darcs uses hashed-storage-0.4.* which in turn means mmap-0.4.*.
I also removed mmap from URM for now.