Is there a way to point on servant-server 0.15 that is not yet on the last haskell LTS?

I would like to use the version 0.15 instead of the the one available on the last LTS (12.22), usually I'm adding this in stack.yaml :

extra-deps :
  - git: [email protected]:haskell-servant/servant.git
    commit: e3e5d2b23057c2c3409e5e210b613527baf3b77d

But they use multiple projects in the same repo so it does not work :-( :

The current entry points to

/Users/nhenin/dev/gsdFlow/.stack-work/downloaded/6krbU6UwORFF/ but no .cabal or package.yaml file could be found there.

Do you know how I could use it ?

Solution

All you need to do is specify sub directories in the repository containing the project:

extra-deps:
  - git: [email protected]:haskell-servant/servant.git
    commit: e3e5d2b23057c2c3409e5e210b613527baf3 
    subdirs:
    - servant

if you needed servant-pipes from the repository as well, for instance, you'd also include it in the list:

...
    subdirs:
    - servant
    - servant-pipes