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Using Stack 2.9.1 to build a package with a dependency on `Cabal` and `process` and: ~~~yaml resolver: lts-19.25 # GHC 9.0.2 (comes with Cabal-3.4.1.0) extra-deps: - Cabal-3.8.1.0 - Cabal-syntax-3.8.1.0 - process-1.6.15.0 ~~~ yields error: ~~~ process > configure process > [1 of 2] Compiling Main ( C:\Users\mikep\AppData\Local\Temp\stack-d0efe7ccadb373e9\process-1.6.15.0\Setup.hs, C:\Users\mikep\AppData\Local\Temp\stack-d0efe7ccadb373e9\process-1.6.15.0\.stack-work\dist\d53b6a14\setup\Main.o ) process > [2 of 2] Compiling StackSetupShim ( C:\sr\setup-exe-src\setup-shim-Z6RU0evB.hs, C:\Users\mikep\AppData\Local\Temp\stack-d0efe7ccadb373e9\process-1.6.15.0\.stack-work\dist\d53b6a14\setup\StackSetupShim.o ) process > process > C:\sr\setup-exe-src\setup-shim-Z6RU0evB.hs:3:1: error: process > Ambiguous module name ‘Distribution.PackageDescription’: process > it was found in multiple packages: process > Cabal-3.4.1.0 Cabal-syntax-3.8.1.0 process > | process > 3 | import Distribution.PackageDescription (PackageDescription, emptyHookedBuildInfo) process > | ~~~ This is because `StackSetupShim` is compiled with (a) the version of `Cabal` that comes with GHC 9.0.2 and (b) the package database that includes `Cabal-syntax-3.8.1.0`, and both export modules named `Distribution.PackageDescription`. This pull request fixes that problem by specifying that the import of `Distribution.PackageDescription` is to come from the `Cabal` package.
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For the record, another way to work around it is described here: https://hackage.haskell.org/package/Cabal-syntax-3.6.0.0 |
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Hello @ulysses4ever. Did you have in mind the Cabal flag |
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Hey there! Indeed, I didn't account for the way Stack works at all. Btw, very clever solution with the package imports! Apologies for the noise and all the best. |
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Using Stack 2.9.1 to build a package with a dependency on
Cabalandprocessand:yields error:
This is because
StackSetupShimis compiled with (a) the version ofCabalthat comes with GHC 9.0.2 and (b) the package database that includesCabal-syntax-3.8.1.0, and both export modules namedDistribution.PackageDescription.This pull request fixes that problem by specifying that the import of
Distribution.PackageDescriptionis to come from theCabalpackage.Please also shortly describe how you tested your change. Bonus points for added tests! Tested by building and using Stack.