[opensuse-buildservice] How to enforce specific system library for a specific package

Hi, I'm currently build bash 5.0 beta as well as readline 8.0 beta. As readline does build local with osc as well as on the OBS and also bash with --prefer-pkgs $PWD/binaries where the readline package are stored ... but the build on the OBS results in nothing provides readline-devel = 8.0 is there any way in prjconf of the repository shell to enforce that the package readline-devel with version 8.0 will be installed but oly for the pacakge bash with version 5.0 Werner -- "Having a smoking section in a restaurant is like having a peeing section in a swimming pool." -- Edward Burr