Nixpkgs version
Describe the bug
I already reported the same issue to the upstream cosmic-epoch repo, but I'm not sure whether this is a cosmic error or a packaging error, so I wanted to report it here as well.
All COSMIC apps show gray cogs instead of icons in the dock and app launcher. When using the COSMIC icon pack, this also applies to most other apps. When switching to another icon pack (like Papyrus), icons for most non-COSMIC apps return, but apps like COSMIC Files, COSMIC Settings, etc., only show the gray cog icon.
In the panel, icons for notifications, Bluetooth, battery, and tiling are completely blank (they occupy the space but show no icons). The same goes for the "Launcher," "Workspaces," and "Applications" buttons in the dock.
This happens with the official COSMIC package from nixpkgs and with the cosmic flake by lilyinstarlight.
It did not happen the first time I installed COSMIC about six months ago, but since then, I have faced this exact problem.
Steps to reproduce
Install the cosmic desktop using the official package or the cosmic flake by lilyinstarlight.
This is my current setup:
{pkgs, ...}: {
services.desktopManager.cosmic = {
enable = true;
xwayland.enable = true;
};
services.displayManager.cosmic-greeter.enable = true;
}Expected behaviour
Icons should render correctly.
Screenshots
Icons not rendering correctly in the panel
Icons not rendering correctly in the dock
Icons not rendering correctly in the application drawer
Icons rendering correctly when using another application drawer like fuzzel
(Sorry for the bad images, but cosmic-screenshot crashes currently, so I have to take a photo of my monitor.)
Relevant log output
Additional context
I also tried with the stable branch, but the issue persists.
A friend of mine also tried, but he does not have any of there problems.
My guess is that an old installation did not remove some relevant files and thus, the package does not install correctly, but I really don't know whats going on.
System metadata
- system:
"x86_64-linux"
- host os:
Linux 6.15.6-zen1, NixOS, 25.11 (Xantusia), 25.11.20250719.c87b95e
- multi-user?:
yes
- sandbox:
yes
- version:
nix-env (Nix) 2.28.4
- channels(root):
"nixos-24.05"
- nixpkgs:
/nix/store/182c2qj20sfspzxcshd6p051qdx3mx5j-source
Notify maintainers
@NixOS/cosmic
Note for maintainers: Please tag this issue in your pull request description. (i.e. Resolves #ISSUE.)
I assert that this issue is relevant for Nixpkgs
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Add a 👍 reaction to issues you find important.
Nixpkgs version
Describe the bug
I already reported the same issue to the upstream cosmic-epoch repo, but I'm not sure whether this is a cosmic error or a packaging error, so I wanted to report it here as well.
All COSMIC apps show gray cogs instead of icons in the dock and app launcher. When using the COSMIC icon pack, this also applies to most other apps. When switching to another icon pack (like Papyrus), icons for most non-COSMIC apps return, but apps like COSMIC Files, COSMIC Settings, etc., only show the gray cog icon.
In the panel, icons for notifications, Bluetooth, battery, and tiling are completely blank (they occupy the space but show no icons). The same goes for the "Launcher," "Workspaces," and "Applications" buttons in the dock.
This happens with the official COSMIC package from nixpkgs and with the cosmic flake by lilyinstarlight.
It did not happen the first time I installed COSMIC about six months ago, but since then, I have faced this exact problem.
Steps to reproduce
Install the cosmic desktop using the official package or the cosmic flake by lilyinstarlight.
This is my current setup:
Expected behaviour
Icons should render correctly.
Screenshots
Icons not rendering correctly in the panel
Icons not rendering correctly in the dock
Icons not rendering correctly in the application drawer
Icons rendering correctly when using another application drawer like fuzzel
(Sorry for the bad images, but cosmic-screenshot crashes currently, so I have to take a photo of my monitor.)
Relevant log output
Additional context
I also tried with the stable branch, but the issue persists.
A friend of mine also tried, but he does not have any of there problems.
My guess is that an old installation did not remove some relevant files and thus, the package does not install correctly, but I really don't know whats going on.
System metadata
"x86_64-linux"Linux 6.15.6-zen1, NixOS, 25.11 (Xantusia), 25.11.20250719.c87b95eyesyesnix-env (Nix) 2.28.4"nixos-24.05"/nix/store/182c2qj20sfspzxcshd6p051qdx3mx5j-sourceNotify maintainers
@NixOS/cosmic
Note for maintainers: Please tag this issue in your pull request description. (i.e.
Resolves #ISSUE.)I assert that this issue is relevant for Nixpkgs
Is this issue important to you?
Add a 👍 reaction to issues you find important.