stack install ghc-mod fails with dependencies conflicts on OSX 10.13.4

Question

When I try to install ghc-mod via stack I end up having these depencies conflicts

Error: While constructing the build plan, the following exceptions were enc         


        

Answer 1

The issue is that ghc-mod does not support newer versions of GHC, I believe the last supported version is GHC 8.0. You can try changing your Stack resolver to lts-8.24 or nightly-2017-06-28 (see the snapshots listed on ghc-mod's Stackage page).

Answer 2

input command line:

stack install ghc-mod --resolver lts-8.24

it really helps.

Answer 3

Even easier, this worked for me: stack install ghc-mod --resolver lts-8.24