How to handle a project with multiple tsconfig.json files?

I'm working on a project structured like this:

\
|- built
|- src
|- perf
   |- tsconfig.json
|- typings
|- tsconfig.json

My tsconfig.json on the root

"target": "es6",
"outDir": "built",
"rootDir": "./src",

I need a different configuration on the perf folder, like a different target.

"target": "es5",

However, my typings folder is on the root of my project, not inside perf folder. So doing a tsc ./perf results in a lot of errors.

Is there a way to tell TypeScript where to look for typings? I'm using

npm install -g typescript@next
// typescript@1.8.0-dev.20151109

Or a way to have different configurations depending on the folder?

Solution

Is there a way to tell TypeScript where to look for typings

Quickest solution

Move typings into pref.