Thanks a lot for our answer. I'm trying to install
mate-ayatana-indicator-applet but I'm getting errors "Waiting for other tasks to finish"
Edit: Error was caused by mate-indicators. Just uninstall it, ok.
mate-ayatana-indicator-applet installed. Now I'm getting error "libecal 1.2 not found". This pull request https://github.com/AyatanaIndicators/ayatana-indicator-datetime/pull/3 tries fix it but is't accepted. I tried download the pull request and make manually but I'm getting "Package 'url-dispatcher-1', required by 'virtual:world', not found" and "Package 'dbustest-1', required by 'virtual:world', not found"
Edit 2: I already installed ayatana-indicator-applet, with this shell commands:
cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_INSTALL_LIBEXECDIR=lib -Denable_tests=OFF ..
So now, how to ayatana-indicators works? I already added indicator-applets to matte panel, but neither show any thing, others shows "No indicators".