# Curious GTk issue with Anydesk / svg pixbuf loader
**URL:** https://discourse.nixos.org/t/curious-gtk-issue-with-anydesk-svg-pixbuf-loader/1736
**Category:** Development
**Created:** [December 22, 2018, 10:38am UTC](https://discourse.nixos.org/t/curious-gtk-issue-with-anydesk-svg-pixbuf-loader/1736 "2018-12-22T10:38:23Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@xte](https://discourse.nixos.org/u/xte)
#### Post date: [December 22, 2018, 10:38am UTC](https://discourse.nixos.org/t/curious-gtk-issue-with-anydesk-svg-pixbuf-loader/1736/1 "2018-12-22T10:38:24Z")
Hello Nixers,
hope to choose the right category… After my latest update (relevant
changes potentially happen few days ago since I update today after
a week) anydesk package seems to be broken due to a GTk issue I do not
understand…
I think the error is there (strace output, running anydesk)
```auto
openat(AT_FDCWD, "$(echo /nix/store/5xbmbiynhpyq59bxwa7xw4hszkh6fgz6-librsvg-2.42.4/lib/gdk-pixbuf-2.0/*/loaders.cache)", O_RDONLY) = -1 ENOENT (No such file or directory)
```
I imaging openat does not execute the subshell but simply try to open a
‘$(echo …’ file that of course not exists, but I do not know how make
the proper substitution happen before openat call…
For “environment” I have in my config since ever
```nix
GDK_PIXBUF_MODULE_FILE = "$(echo ${pkgs.librsvg.out}/lib/gdk-pixbuf-2.0/*/loaders.cache)";
```
and normally GTk apps can load svg icons issueless, and they still do
now. I also have gdk-pixbuf-query-loaders binary, actually as
```auto
/nix/store/05smyn5mn42xl1vfkyinqlahwcds5a3f-gdk-pixbuf-2.38.0-dev/bin/gdk-pixbuf-query-loaders
```
Running anydesk result in
```auto
(process:19467): GdkPixbuf-WARNING **: 11:11:19.119: Cannot open pixbuf loader module file '$(echo /nix/store/5xbmbiynhpyq59bxwa7xw4hszkh6fgz6-librsvg-2.42.4/lib/gdk-pixbuf-2.0/*/loaders.cache)': No such file or directory
This likely means that your installation is broken.
Try running the command
gdk-pixbuf-query-loaders > $(echo /nix/store/5xbmbiynhpyq59bxwa7xw4hszkh6fgz6-librsvg-2.42.4/lib/gdk-pixbuf-2.0/*/loaders.cache)
to make things work again for the time being.
terminate called after throwing an instance of 'base::gdk_exception_t'
```
file say
```auto
file /nix/store/5xbmbiynhpyq59bxwa7xw4hszkh6fgz6-librsvg-2.42.4/lib/gdk-pixbuf-2.0/*/loaders.cache
/nix/store/5xbmbiynhpyq59bxwa7xw4hszkh6fgz6-librsvg-2.42.4/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache: ASCII text
```
And both gdk-pixbuf-query-loaders and already created file are
essentially the same not counting autogenerated comments.
Does anyone have an idea?
A quick search reveal few similar issues in the past, like [1] but they
seems “already there” for anydesk…
If it’s relevant I’m on NixOS stable with few unstable pkgs added, my DE
is EXWM launched via LightDM…
Thanks for now!
[1] [package key-mon is broken · Issue #11183 · NixOS/nixpkgs · GitHub](https://github.com/NixOS/nixpkgs/issues/11183)
– Ingmar
---
### Author:  [@jtojnar](https://discourse.nixos.org/u/jtojnar)
#### Post date: [December 22, 2018, 1:29pm UTC](https://discourse.nixos.org/t/curious-gtk-issue-with-anydesk-svg-pixbuf-loader/1736/2 "2018-12-22T13:29:14Z")
Hmm, I would not expect `environment.variables.GDK_PIXBUF_MODULE_FILE = "$(echo ${pkgs.librsvg.out}/lib/gdk-pixbuf-2.0/*/loaders.cache)";` to
work at all, but apparently the variables are not escaped at all:
[https://github.com/NixOS/nixpkgs/blob/5bae6dea205144bbf2689a42fdbbf490745d52f4/nixos/modules/config/shells-environment.nix#L12-L28](https://github.com/NixOS/nixpkgs/blob/5bae6dea205144bbf2689a42fdbbf490745d52f4/nixos/modules/config/shells-environment.nix#L12-L28);
I do not see any relevant changes in the module either.
It would be much better to use the new gdk-pixbuf module from unstable:
`services.xserver.gdk-pixbuf.modulePackages = [pkgs.librsvg];` You
can cherry-pick [Use a NixOS module for generating the gdk-pixbuf loaders cache. by ambrop72 · Pull Request #42562 · NixOS/nixpkgs · GitHub](https://github.com/NixOS/nixpkgs/pull/42562)
---
### Author:  [@xte](https://discourse.nixos.org/u/xte)
#### Post date: [December 23, 2018, 11:27am UTC](https://discourse.nixos.org/t/curious-gtk-issue-with-anydesk-svg-pixbuf-loader/1736/3 "2018-12-23T11:27:39Z")
Hi,
> Hmm, I would not expect `environment.variables.GDK_PIXBUF_MODULE_FILE = "$(echo ${pkgs.librsvg.out}/lib/gdk-pixbuf-2.0/*/loaders.cache)";` to
> work at all, but apparently the variables are not escaped at all:
> Mh, actually saying it does work is a big exaggerated since I simply
> use it in the past and left in my config to properly see icons for
> Udiskie and ClipIt, after that icons shows properly and keep working
> so I say “hey, it work” without testing removal…
> It would be much better to use the new gdk-pixbuf module from unstable:
> `services.xserver.gdk-pixbuf.modulePackages = [pkgs.librsvg];` You
> can cherry-pick [Use a NixOS module for generating the gdk-pixbuf loaders cache. by ambrop72 · Pull Request #42562 · NixOS/nixpkgs · GitHub](https://github.com/NixOS/nixpkgs/pull/42562)
> Thanks, it does work now, despite only if run via sudo, but I think
> that’s another issue… That’s nice however, I hope it will be merged
> on stable 🙂
Thanks again,
– Ingmar