CODEWITHSUNDEEP
ghchaskell-stacknixos
mherzl
mherzl

Reputation: 6210

How does stack determine which ghc to use?

My in-path ghc version is 8.4.4, as show by running $ ghc -- version.

$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 8.4.4.

Somehow, however, my stack is using a different version, as shown by running $ stack ghc -- --version.

$ stack ghc -- --version
The Glorious Glasgow Haskell Compilation System, version 8.0.2.

I have no idea where the 8.0.2 of ghc is even installed on my system. How is this possible, and how can I update the version of ghc my stack uses?

Upvotes: 1

Views: 242

Answers (1)

Chris Stryczynski
Chris Stryczynski

Reputation: 33911

I believe it references a resolver (which in turn references a GHC version). This could be a local stack.yaml file or the global one at ~/.stack/global-project/stack.yaml.

Upvotes: 2

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