process-1.6.19.0: relax upper bound of dependency on base

[mpilgrem]

process-1.6.19.0 is a boot package of GHC 9.10.1 which is tied to base-4.20.0.0. However, the Cabal file for process on Hackage specifies base < 4.20.

I have been tryng to build Stack with GHC 9.10.1. It compiles with process-1.6.19.0 if the upper bound of that package's dependency on base is ignored.

[tomjaguarpaw]

If you're getting it from Hackage anyway, would process-1.6.20.0 not be good enough? It supports base < 4.21

https://hackage.haskell.org/package/process-1.6.20.0

[mpilgrem]

@tomjaguarpaw, you can build with process-1.6.20.0 but that is a different build plan than the one promised by a snapshot that specifies GHC 9.10.1 and (by implication) the boot packages that come with GHC 9.10.1.

[tomjaguarpaw]

That's interesting. Does Stack check bounds for boot libraries that come with GHC? Cabal (seemingly) doesn't. See: #316 (comment)

[mpilgrem]

It is a little complicated. If you specify a GHC boot package as an extra-dep then you have to specify also any boot package dependencies as an extra-dep. If you specify a boot package as an extra-dep, Stack effectively gets its Cabal file from Hackage.

Normally, you don't have to specify a GHC boot package as an extra-dep. That is because, normally, a Stackage snapshot does not specify any GHC boot packages directly. They get 'included' only because specifying a GHC version brings with it all of that version's boot packages.

Recently, however the Stackage project has been issuing mis-specified (from my perspective) nightly snapshots that specify Cabal directly. Which means that if you override the compiler in those snapshots (I was overrding GHC 9.8.2 with GHC 9.10.1), you also have to specify the intended Cabal version as an extra-dep - and that leads to other boot packages needing to be specified as extra-deps.

[tomjaguarpaw]

Interesting. In any case, this should do what you want: https://hackage.haskell.org/package/process-1.6.19.0/revisions/