[Haskell-cafe] cabal or stack command to fetch and add dependency to .cabal file

[xu xiut]

With node.js, you can run `npm install --save package at 1.01`, and that
version of the package will be retrieved and added to your list of
dependencies. If you leave off the version number, it will retrieve the
latest version from a default repository of packages.

Are there any plans to add something this to either cabal or stack?
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