Cant install certain hybrid packages

[SolitudeSF]

Any hybrid package with structure of

srcDir/pkgname/...
srcDir/pkgname.nim

will fail to install with Error: unhandled exception: Is a directory [OSError] since it tries to put extensionless binary in the same directory as library component of the package.

[genotrance]

Both choosenim and nimble use a pkg extension to avoid this: src/choosenimpkg and src/nimblepkg.

What's could be considered as a fix for this?

[SolitudeSF]

placing binaries in separate folder? placing them into bin directly instead of symlinks? idk

[genotrance]

Dup of #308, closing.