needs repro: known issue (possibly resolved) about package structure assumption

Compile operation assumes that the entrypoint of your package (`main` in `package.json`) is at the top level of your source code tree
* e.g. `./index.ts` or `./src/index.ts`
* but not e.g. `./src/foo/index.ts` next to `./src/bar/somethingelse.ts`
* the latter would probably fail to compile all files, or will put them in the wrong directories
* or maybe I fixed all that, need to move this to an Issue