Cannot be build with stack

[dnlkrgr]

When putting this package into my stack.yaml as a extra-deps I'm getting the following error: ": error:
Could not find module ‘Yesod.Auth.OAuth2.GitHub’
It is not a module in the current program, or in any known package.
"

[pbrisbin]

Did you also add yesod-auth-oauth2 as a dependency in package.yaml (or {project}.cabal)? Having it in extra-deps makes it available, but you still need to list it as a dependency in your project.

[pbrisbin]

Closing as unable to reproduce. Happy to still follow up and figure out why it's not working for you, but the project indeed builds fine AFAICT, so I suspect it's something else going on.

% cat stack.yaml
resolver: lts-12.14
packages:
  - .
extra-deps:
  - yesod-auth-oauth2-0.5.2.0
  
  # required as transitive through yesod-auth-oauth2
  - hoauth2-1.7.2
  - uri-bytestring-aeson-0.1.0.6

# needed because hoauth2 requires exceptions < 0.10
allow-newer: true

% grep -A 3 '^dependencies:' package.yaml
dependencies:
- base >= 4.7 && < 5
- yesod-auth-oauth2

% grep import src/Lib.hs
import Yesod.Auth.OAuth2.GitHub

% stack build; echo $?
WARNING: Ignoring out of range dependency (allow-newer enabled): exceptions-0.10.0. hoauth2 requires: >=0.8.3 && <0.10
0