I like to announce a tiny tool that * extracts version information from Cabal files, * maintains version tags in darcs, * computes patch levels by querying darcs, * extracts the current context from darcs, and * adds all this information to a source file (eg, for printing with --version and --exact-version type of options). More at http://www.cse.unsw.edu.au/~chak/haskell/VersionTool/ Happy Hacking! Manuel