run transformer on .d.ts file

I want to run the transformer on the .d.ts files directly, but this doesn't seems to work. 
Basically my use case is to extract some type from the .d.ts files from the node_modules and store them in a different files.
I've tried adding node_modules in include[] of tscong.json, but the transformer doesn't seems to be running on the .d.ts files.
 