Plugin does not work when mixed with gulp-watch

[cowwoc]

Given:

    var sources = srcDir + "**/*.js";
    return gulp.src(sources).
        pipe(duration("jshint")).
        pipe(watch(sources)).
        pipe(jshint(config)).
        pipe(jshint.reporter(reporter)).
        pipe(livereload());

I get a duration notice once (when the default task is executed). The plugin does not run each time gulp-watch (https://github.com/floatdrop/gulp-watch) re-runs the task after a file is modified.

On the other hand, if I move duration to the line after watch I never see output from the plugin at all. Any ideas?