Does not work in procedural macros called from a build script

[dylanede]

Since the [build-dependencies] section of the Cargo manifest is not checked (only [dependencies] and [dev-dependencies]), it fails to find crates that are only specified there. A simple fix would be to check there as well, but really you'd only want to check there if the current target is a build script. I'm not sure what the best way of determining that is.

[bkchr]

Hey, thank you for the issue. I actually never thought about using this from a build script. However it makes sense, I see what I can do.