Haskell Stack install package dependency from github

Question

Is it possible to install a version of a package from github using Haskell stack?

e.g. in a .cabal or a stack.yaml file, how can I point a depe

Answer 1

In my case i wanted to depend on a fork of pandoc, specifying a precise commit. It worked by adding the following to stack.yml:

extra-deps: - archive: https://github.com/italia/pandoc/archive/1327c564cccf5dfa387a2956443990d9854c85cd.zip

This would work with any branch-like URL on Git. I found my url by browsing the files at the commit and copying the URL from the "Download ZIP" button.

Note that my branch has a specific version, higher than any version Stack could fetch from the resolver. I pinpoint the version in the Cabal dependencies. If the version on that branch would overlap with one available in the resolver's index, i'm not sure about which one would be picked