In reply to @k900:0upti.meYou should be able to work around it by setting environment.variables.KPACKAGE_DEP_RESOLVERS_PATH = "${pkgs.plasma5Packages.frameworkintegration}/libexec/kf5/kpackagehandlers"
environment.variables.KPACKAGE_DEP_RESOLVERS_PATH = "${pkgs.plasma5Packages.frameworkintegration}/libexec/kf5/kpackagehandlers"