CODEWITHSUNDEEP
haskelltimedependencieshackagehaskell-time
MMacphail
MMacphail

Reputation: 561

Using Haskell Time library ISO8601 format

I'm using the Haskell Time Library. I'm trying to use the ISO-8601 date formatters.

In my code, I can import the Data.Time module and use it without any problems. However, when I import the Data.Time.Format.ISO8601 functions and definitions I get the following error: Could not find module.

I'm new to Haskell and I'm not confident in my ability to understand dependencies in the package manager yet. I have a Java oriented background.

Upvotes: 1

Views: 318

Answers (1)

MMacphail
MMacphail

Reputation: 561

I finally manage to understand what was going on thanks to Trevor Cook's comment.

Stack pulls dependencies from Stackage by default, which did not contain the latest time package version. So I needed to specify the version to force stack to use Hackage instead of Stackage for my time package resolution by adding an extra-dep in my stack.yaml file:

extra-deps:
- time-1.9.2

After running stack build the compiler was able to find the ISO 8601 Date Format module.

Upvotes: 2

Related Questions