Hackage Dependency Monitor Reverse Dependency List | License List What is this? It can often get tedious to keep your package dependencies up-to-date. This tool is meant to alleviate a lot of the burden. It will automatically determine when an upper bound on a package prevents the usage of a newer version. For example, if foo depends on bar >= 0.1 && < 0.2, and bar 0.2 exists, this tool will flag