this.userProperties = userProperties;
            return this;
        }

        public ModelBuilderRequestBuilder repositoryMerging(RepositoryMerging repositoryMerging) {
            this.repositoryMerging = repositoryMerging;
            return this;
        }

        public ModelBuilderRequestBuilder repositories(List<RemoteRepository> repositories) {

              <!-- was only a workaround for Plexus Container, hopefully never used by anyone else -->

                    configuration.setProcessPlugins(false);
                    configuration.setRepositoryMerging(ProjectBuildingRequest.RepositoryMerging.REQUEST_DOMINANT);
                    MavenSession session = legacySupport.getSession();
                    if (session != null) {
                        configuration.setSystemProperties(session.getSystemProperties());