Hello. Found the ghc reported to have issues: https://ci.guix.gnu.org/build/1567747/details
Going back in time to the commit that corresponds with the ghc that was reported to be broken: ----- $ guix time-machine --commit=caa366ec230ccc42f5c8d90d36e8cac933053a81 \ -- environment --pure --ad-hoc ghc [env]$ ghci GHCi, version 8.6.5: http://www.haskell.org/ghc/ :? for help <interactive>:1:6: error: Not in scope: `System.IO.hSetBuffering' No module named `System.IO' is imported. <interactive>:1:30: error: Not in scope: `System.IO.stdin' No module named `System.IO' is imported. ... ... ----- It was indeed broken. I believe 83aa6562173e06e8fafd4857a2e708feabfe56f8 fixed this. Validating that ghci can actually start properly now with a current version of guix: ----- $ guix --version guix (GNU Guix) 2971ed57345ee4e00058efeaf27c6a0790fdc9dd $ guix environment --pure --ad-hoc ghc -- ghci GHCi, version 8.6.5: http://www.haskell.org/ghc/ :? for help Prelude> 1 + 2 3 ----- Going to go ahead and close.
