ghc `stack build` not working for `concur-vdom`

The ghcjs version compiles perfectly, but now I’m trying to get the regular ghc version compiling so I can use it with ghci in emacs. concure-core compiles with ghc, but concur-vdom has this error:

Warning: Directory listed in concur-vdom.cabal file does not exist: ghc-src

Error: While constructing the build plan, the following exceptions were encountered:

In the dependencies for concur-vdom-0.1.0.0:
    concur-core must match -any, but the stack configuration has no specified version
    jsaddle-webkit2gtk must match -any, but the stack configuration has no specified version
                       (latest applicable is 0.9.4.0)
needed since concur-vdom-0.1.0.0 is a build target.

Recommended action: try adding the following to your extra-deps in /home/teddy/haskell/superpowerscorp/concur/concur-vdom/stack.yaml:
- jsaddle-webkit2gtk-0.9.4.0

You may also want to try the 'stack solver' command
Plan construction failed.

I got a little further by adding jsaddle-webkit2gtk as well as including the concur-core directory in stack.yaml, but then it spits out a bunch of other dependency problems.

[mpdairy]

@robinvd Yep, you just have to move your servant api definition and proxy into some common place (and use Data.Proxy(Proxy) instead of Servant-server’s Proxy), then use this library: https://github.com/plow-technologies/ghcjs-servant-client to generate the functions that call the api. I also used Network.Wai.Middleware.Cors on the server to avoid cross origin errors while I’m developing.

[robinvd]

@mpdairy is servant working with ghcjs?