Declaration file generation not working as expected

TypeScript Version: 4.0.0-dev.20200429 (when trying with @next)
TypeScript Version: 3.8.0.0-dev.20200429 (when using my version ^3.8.0)

Search Terms: module resolution, lerna, monorepo, import type, declaration file

Code
Repository https://github.com/Volox/tsc-declaration-issue

To bootstrap and run:

npx lerna bootstrap
npx lerna run compile

Expected behavior: The declaration files generated are only related to the package.

Actual behavior: The declaration files are generated correctly only for lib1 and lib2 have the full tree of declaration files of both packages.

Related Issues: None that I was able to find

Notes:
The generation of declaration files is done correctly if I remove the "paths" property from tsconfig.base.json but I receive compilation errors like:

src/index.ts(1,19): error TS2307: Cannot find module 'lib1'.
src/index.ts(3,24): error TS2307: Cannot find module 'lib1/foo/bar'.

Usa el repositorio enlazado Volox/tsc-declaration-issue y ejecuta npx lerna bootstrap, seguido de npx lerna run compile. Compara las declaraciones generadas para lib1 y lib2 con y sin la propiedad paths en tsconfig.base.json, mientras compruebas los errores de resolución de módulos indicados. La tarea está terminada cuando cada paquete emite únicamente su propio árbol de declaraciones sin esos errores.