Yeah, the latter is certainly a big part of it. The way to make it compile-safe is to use macros to generate code, so that my users can write e.g. Package::my_frontend.version and that gives them the version of their frontend package.
Writing such macros, i.e. writing code to generate code, is certainly something I haven't done a ton of yet, because you practically cannot justify doing that in an application codebase, only in a library, so it is new stuff that I learn.

But well, you did already call it a "nice abstraction", which is another big part where my excitement comes from and where I think, the special nerdery is necessary.
Others might build projects which are visually tangible, like a sexy GUI, or which do something tangible, for example a colleague (who I will absolutely not deny his own special nerdery) is currently building a driver for a motor. If that driver works, you can see a motor moving in the real-world. Even non-nerds can at least tell that something is happening.

But with my project, my success is that you can write Package::my_frontend instead of Package::from_str("my_frontend")?. And that if you rename the package to super_duper_frontend, that the compiler will tell you to fix the code rather than it only breaking once you actually run the build code for the frontend.
No chance of explaining to non-coders why this is exciting or even just when you're successful.

Thanks!