I second cabal-plan, but I am suggesting in particular the PR https://github.com/haskell-hvr/cabal-plan/pull/53 which features the sub-command `why-depends` pruning the dependency tree to show you exactly why you depend on a certain package. (Trying to raise some awareness for that PR as I want it to be merged) Best regards, Fendor On 13/03/2022 18:31, Vanessa McHale wrote:

I would use cabal-plan: https://hackage.haskell.org/package/cabal-plan

there’s a subcommand, cabal-plan dot, which produces output suitable for graphviz: https://graphviz.org

Cheers, Vanessa McHale

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On Mar 13, 2022, at 7:10 AM, Henry Laxen wrote:

Dear Haskell friends,

Is there a way to discover why a certain package is being compiled?  In my case, the package cryptonite is a dependency of some other package, but I don't know which one.  cryptonite doesn't compile on GHC 9.2.2, so if I can find out which package is causing it to be selected, perhaps I can work around my code so it (my code) does not depend on that package.  I hope I am making myself clear.  Any pointers would be appreciated. Best wishes, Nadine and Henry Laxen            The rest is silence _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

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