@hackage cabal-progdeps1.0

This utility can be used to display the version dependency information for the program being built in the current directory. Essentially it parses the dist/setup-config and displays the information in a readable format. This can be very helpful when adding version constraints to your package's dependencies in that it shows what your package is currently built (or configured to be built) with.

n.b. It's called "progdeps" instead of "pkgdeps" because it's examining the build information in the current directory and not actual packages.

Usage: cabal-progdeps

Works with cabal-dev and cabal.