Too many icons blank, icon-mapping option has no effect

[salgadev]

Many icons show up as blank when using wf-shell, Namely:

• network bar icon
• Apostrophe
• Nemo
• Spotify
• imv
• footclient
• Joplin
• Armcord

Also, the icon-mapping option from wf-shell has no effect.

System description:

• NixOS Unstable branch
• My system config
• dotfiles (Wayfire config)

[mark-herbert42]

it is strange but have same effect for mate-panel tasklist. Also no idea why this happens.

[soreau]

Maybe it has something to do with the theme?

[mark-herbert42]

Well - changing icon theme do some change - the common icon of unknown file type changes when I change theme. But I test it on mate-panel and there is also bug about this. And strange thing - sometimes it starts working well. Sometimes stops. I am on gentoo so the rolling versions of everything and I could not figure out which update made the difference. The strange thing that it also happened with wf-panel - I was thinking this is a mate bug. But looks like the root of it is somewhere in gtk.

[salgadev]

I've tried with several icon packs and most of these are missing. The best I could do was have the full cinnamon desktop installed at the same time but it's overkill just to have working icons.
Also, has any of you used the icon-mapping feature?
I have not been able to make it work with anything.