private List<ArtifactRepository> pluginArtifactRepositories;

    private ExecutionListener executionListener;

    private int degreeOfConcurrency = 1;

    private String builderId = "singlethreaded";

    private Map<String, List<ToolchainModel>> toolchains;

    /**
     * Suppress SNAPSHOT updates.
     *
     * @issue MNG-2681
     */
    private boolean noSnapshotUpdates = false;

        mavenExecutionRequest.setLoggingLevel(MavenExecutionRequest.LOGGING_LEVEL_INFO);
        mavenExecutionRequest.setDegreeOfConcurrency(1);
        mavenExecutionRequest.setBuilderId("singlethreaded");
        return mavenExecutionRequest;
    }

    @Override
    protected void lookup(MavenContext context) throws Exception {
        if (context.maven == null) {
            super.lookup(context);