Graphical applications do not use Ubuntu's gtk theme correctly

[expipiplus1]

Issue description

When starting a GUI application on Ubuntu one gets the following warnings printed to stderr. The theme of the GUI program is not the same as the rest of the system.

Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "atk-bridge"
Gtk-Message: Failed to load module "canberra-gtk-module"
GLib-GIO-Message: Using the 'memory' GSettings backend.  Your settings will not be saved or shared with other applications.

Steps to reproduce

$ nix-shell -p electron --run electron

Additionally one can resize the window so that a scrollbar is present; observe that this isn't the Ubuntu 'overlay scrollbar'.

Technical details

• System: Ubuntu 16.10
• Nix version: nix-env (Nix) 1.11.7
• Nixpkgs version: 17.09pre102933.26625c9

[Ericson2314]

Emacs looks especially bad; It doesn't spit out any clues on the standard streams, unfortunately.

[expipiplus1]

Another log with a couple of new messages:

Gtk-Message: 10:21:46.538: Failed to load module "overlay-scrollbar"
Gtk-Message: 10:21:46.546: Failed to load module "atk-bridge"
Gtk-Message: 10:21:46.546: Failed to load module "unity-gtk-module"

(quartus:14678): Gtk-WARNING **: 10:21:46.555: Unable to locate theme engine in module_path: "murrine",

<repeated many times>

(quartus:14678): Gtk-WARNING **: 10:21:46.558: Unable to locate theme engine in module_path: "murrine",
Gtk-Message: 10:21:46.558: Failed to load module "canberra-gtk-module"

[nh2]

I have this too; here's an example what gajim looks like from 18.09 on Ubuntu 16.04:

meld looks even worse and is absolutely unusable, because you can't see where the buttons are.

[nh2]

Is is possible to change the GTK theme somehow, only for nix-installed applications, so that this doesn't happen?

[mraxilus]

Has anyone found a workaround for this?
I'm trying to launch the joplin-desktop package.
I get the follwing output:

Gtk-Message: 23:26:34.219: Failed to load module "canberra-gtk-module"
Gtk-Message: 23:26:34.220: Failed to load module "canberra-gtk-module"
Trace/breakpoint trap (core dumped)

[jtojnar]

Setting something like this GTK_PATH="${gtk-engine-murrine}/lib/gtk-2.0:${gtk_engines}/lib/gtk-2.0" might help for the GTK 2 apps regarding

(quartus:14678): Gtk-WARNING **: 10:21:46.558: Unable to locate theme engine in module_path: "murrine",

We generally consider theming user’s responsibility as we cannot know what theme and engine they like.

[stale]

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[vishnu-prasad-kurupath]

This issue with tidal-hifi and flameshot on debian. Any help would be appreciated !!