Re: Packaging elm-compiler 0.19.1

[John Soo]

Hi Matthew,


Matthew Kraai <kraai@ftbfs.org> writes:

> I think that elm-compiler is built with GHC 8.6.5, not GHC 8.8.3. 
> When I run `guix environment --pure --ad-hoc ghc@8.6.5 -- ghc-pkg
> list`, its output contains `time-1.8.0.2`.  I tried changing the
> definition of `ghc-8` in `haskell.scm` from `ghc-8.6` to `ghc-8.8`,
> but then `integer-logarithms` fails to build.  Maybe I have to upgrade
> to the latest LTS Haskell.

The haskell-build-system respects a #:haskell argument like so:

(arguments
 `(#:haskell ,ghc-8.8 ...))

That way you don't end up bumping the default ghc for everyone while
updating one package.

I tried your definition with ghc@8.8 as above and some new packages were
not in constraints.  Can you go from there and update the
"update-constraints" phase as you go? Maybe that will be enough.


Thanks!

- John