Not finding System.Random

[Andrew Clark]

When using the IDE-Haskell, if I use an import such as import System.Random, I get an error:

Failed to load interface for `System.Random'
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However, if load the module directly in ghci it works as expected.

Any ideas why?

[Nikolay Yakimov]

So, any luck?

[Andrew Clark]

In the end no, reverting back to ghc 8.0.2 seemed to cause other issues. Just have to stack exec atom for now!

[Nikolay Yakimov]

Okay. Just be aware that building with cabal will likely fail -- cabal will complain about GHC_PACKAGE_PATH.

[Dan Motzenbecker]

Any advice on fixing this?

[Nikolay Yakimov]

@dmotz, the most common reason for this is a missing package in the cabalfile build-depends.