Tag Preview only showing app icons instead of images of windows

[tom8347]

I'm on NixOS with awesome-4.3. I installed the bling repo as instructed (cloning into .config/awesome/bling). When I installed it I found that it threw an error when I tried to load the awesome config. I "fixed" this by commenting out the module = require(... .. ".module"), line in bling's init.lua. I reasoned that this shouldn't affect the tag_preview functionality but maybe I'm wrong?

After commenting out the require .module line I enabled the tag_preview exactly as instructed in the docs. And it seems to be working but the preview shows only the window layout with program icons rather than the content of the actual window? Is there some reason why it might be failing to get the image?

[Nooo37]

I think the issue of the first paragraph is #218 (given that you are on nixos)

The issue of the second paragraph, I don't know