CODEWITHSUNDEEP
haskellhaskell-stack
user4601931
user4601931

Reputation: 5285

Error creating new project with Haskell Stack

Right now I'm not able to do stack new my-project anywhere in my filesystem. When I do, I get

| => stack new my-project
Downloading template "new-template" to create project "my-project" in my-project/ ...

Looking for .cabal or package.yaml files to use to init the project.
Using cabal packages:
- my-project/my-project.cabal

Selecting the best among 12 snapshots...

Downloaded lts-10.2 build plan.
AesonException "Error in $.packages.cassava.constraints.flags['bytestring--lt-0_10_4']: Invalid flag name: \"bytestring--lt-0_10_4\""

This prevents me from setting up and building the project:

| => cd my-project; stack build
Error parsing targets: The specified targets matched no packages.
Perhaps you need to run 'stack init'?

I have Stack Version 1.5.1 and GHC 8.0.2. What could be causing this? I'm really at a loss. I haven't found anything documented online similar to what I'm describing.

Upvotes: 0

Views: 2765

Answers (1)

YAMAMOTO Yuji
YAMAMOTO Yuji

Reputation: 1434

Same as https://github.com/fpco/stackage/issues/2759 .
Upgrade stack to v1.6.1

Upvotes: 3

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