error readCreateProcess: cabal-helper-wrapper "print-build-platform" (exit 1): failed

[luochen1990]

I'm using:

• Ubuntu 18.04.2 LTS (under Windows WSL)
• NVIM v0.4.0-811-gca1ce5902
• LanguageClient-neovim 41c948e (2019-05-08 21:17:55)
• haskell-ide-engine 33d4581 (2019-05-18 21:37:50)

My workaround:

export PATH="$PATH:$(stack path --compiler-bin)"

The problem of my workaround:

When I'm working on single files outside of any project, hie cannot find modules correctly.

Another workaround I have tried:

Add following file into PATH dir, name it ghc and chmod +x ghc

#!/bin/sh
stack exec -- ghc "$@"

But this workaround failed, seems that cabal-helper-wrapper is not finding ghc in PATH.

Here is a related issue: haskell/vscode-haskell#128

[samuelpilz]

Hie does not work if the cabal file is missing, iirc.

[nponeccop]

The error message could be better. User errors should never look like crashes.

[luochen1990]

So, is it possible to support single file ?

[fendor]

That feature request should be a separate issue.

[nponeccop]

Can we close the issue as invalid?

[fendor]

Not supported out of the box.
Can be worked around now with a custom cradle, e.g. direct cradle where you specify all the ghc options.