`npmFilesToBuild` not working correctly

[fvictorio]

Describe the issue

Reproduction:

• Install the @zk-kit/lazy-imt.sol package.
• Add @zk-kit/lazy-imt.sol/LazyIMT.sol to npmFilesToBuild
• Compile

No artifact is created for the library in that file.

I strongly suspect that the reason is that the package has .sol in its name. Installing it with another name (pnpm i @zk-kit/lazy-imt@npm:@zk-kit/lazy-imt.sol) and adapting the npmFilesToBuild to use the alias does produce the expected artifact.