Hi Ulf
Has any progress been made on this?
I ran into the same thing, except with native-inputs instead of inputs.
I spent a fair amount of time trying to pin it down, since I don't know much guile and it requires a combination of conditions to manifest.
Is it worth documenting this behaviour? Or do we expect a solution will be implemented soon enough?
For now, is the following guideline accurate enough to avoid these surprises?
If we inherit a package that uses (either directly or through inheritance) this-package-native-input (or this-package-input), we should not modify the native inputs (or inputs) via replace if substitute-keyword-arguments is used anywhere in the inheritance chain.
Thanks
Jake