Is there a way to adjust lookup paths for modules during compilation?

[Andrey Zherikov]

On Wednesday, 31 July 2019 at 20:16:01 UTC, H. S. Teoh wrote:
> On Wed, Jul 31, 2019 at 08:09:29PM +0000, Andrey Zherikov via 
> Digitalmars-d-learn wrote:
>> I found a function that seems could be used for adding import 
>> paths: dmd.frontend.addImport 
>> (https://dlang.org/phobos/dmd_frontend.html#.addImport). But 
>> it's not clear how can I use it: dmd directory is not added to 
>> lookup by default and trying adding it gives errors:
> [...]
>
> That's because you can only call that function from inside dmd 
> code. It's not available for user code to call.
>
>
> T

I even suspect that dmd package which (I guess) is supposed to be 
"DMD as a library" doesn't interact with DMD instance that is 
compiling the code.