[arch-general] devilspie doesn't work

Hi, I want to run devilspie to add opacity to windows of particular apps. But i can't get it to work. I can't even run the example script from arch wiki article [1]. I've tried it under twm and dwm; both don't work. I run "devilspie -d -a" command, to set it to debug mode, then I get: Devil's Pie 0.22 starting... Loading /etc/devilspie Loading /etc/devilspie/example.ds Loading /home/maciejjo/.devilspie Loading /home/maciejjo/.devilspie/opacity.ds 2 s-expressions loaded. But I think it should report something when I open and close windows, and it does not. Can someone reproduce this issue? [1] https://wiki.archlinux.org/index.php/Per_Application_Transparency maciejjo