Next goal: yesod-core (dependency of git-annex-5.20140517:+webapp) Trying: transformers-0.4.1.0/installed-ac1. ![]() ![]() One way to see it still is to try cabal install git-annex in a fresh cabal sandbox. Unfortunately we're still seeing this issue despite the attempts at fixes. Real fixes for cabal-install are in the works, this is just a near term mitigation Note that you actually need to do these steps before doing your normal cabal-install routine, and baking them into your Foo.cabal package file WILL NOT fix the problem. There are probably other valid work arounds, but the one I suggest above seems to help everyone who hits this issue. The issue is that the cabal install solver gets a bit stuck picking -ftransformers2 for many install plans, and this gets folks into having some pretty confusing cabal-install errors. ![]() ![]() In the mean time, an easy fix is: cabal install transformers-compat -ftransformers3 Some fixes are in the work for cabal-install ( a huge thanks to them). Not transformers fault, more like a perfect storm of other issues, mostly relating to how cabal-install's current solver gets a bit stuck when choosing flags that dictate which dependency constraints to solve. Theres been a huge rash of breakages relating to transformers 0.4 landing on hackage.
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