Unexpected value 'JsonApiModule' imported by the module 'AppModule' #36

After upgrading to v3.2, I've got this error message :

client?8fb9:75 ./client/app/app.module.ts (5,31): error TS2307: Cannot find module 'angular2-jsonapi'.
compiler.umd.js?9df7:13996 Uncaught Error: Unexpected value 'JsonApiModule' imported by the module 'AppModule'

I tried to change the position of the import at the top of my app.module.ts, and in the imports[] of my ngModule. No success.

Also tried the fix proposed in #13 and related issues :
module.exports = { resolve: { modules: [ path.join(__dirname, "node_modules") ] } };

Doesn't work either.
Note that the "Unexpected value" displays only in Chrome console, not in my build process.

I use Webpack 1.13.2, but not angular-cli, my project boilerplate is created from scratch.

Thx for your help.