GNOME Boxes Flatpak unable to start

[x80486]

Describe the Bug

I recently started using NixOS 23.05.1272.ecb441f2206. I configured the Flatpak service successfully, and I'm able to do pretty much anything in that regard. Problem is that GNOME Boxes (org.gnome.Boxes) is unable to start.

This is an application that could require some other capabilities at the system level, but I can't see (read: identify based on what I know) anything in the journal that could tell me what's wrong.

Steps To Reproduce

1. Install NixOS 23.05.1272.ecb441f2206
2. Configure Flatpak support and add flathub repository — restart system if required
3. Install GNOME Boxes — flatpak install flathub org.gnome.Boxes
4. Start GNOME Boxes using the application's icon

Expected behavior

Application should be able to start.

Additional context

I did try using the command-line (flatpak run org.gnome.Boxes), and it actually starts, so I guess the issue might be easier to solve?

This is what happens on my end when I start the application:

[x80486@uplink:~]$ journalctl --follow 
Jun 26 14:24:18 uplink dbus-daemon[1780]: [session uid=1000 pid=1780] Activating service name='org.gnome.Boxes' requested by ':1.11' (uid=1000 pid=1871 comm="/nix/store/jh2mygwy1651fmgpx2w0y3qrdcs5r3vc-gnome-" label="kernel")
Jun 26 14:24:18 uplink dbus-daemon[1780]: [session uid=1000 pid=1780] Activated service 'org.gnome.Boxes' failed: Failed to execute program org.gnome.Boxes: No such file or directory

...and this is what I get when I start the application via the command-line:

[x80486@uplink:~]$ journalctl --follow 
Jun 26 14:25:52 uplink systemd[1771]: Started app-flatpak-org.gnome.Boxes-45208.scope.
Jun 26 14:25:52 uplink virtqemud[45259]: libvirt version: 9.0.0
Jun 26 14:25:52 uplink virtqemud[45259]: hostname: uplink
Jun 26 14:25:52 uplink virtqemud[45259]: Unable to open /dev/kvm: No such file or directory
Jun 26 14:26:00 uplink virtqemud[45259]: End of file while reading data: Input/output error

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

[x80486@uplink:~]$ nix-shell -p nix-info --run "nix-info -m"
these 4 paths will be fetched (0.71 MiB download, 9.84 MiB unpacked):
  /nix/store/087609j187svcvxi5rn0jk3b9rh9pm24-file-5.44
  /nix/store/5wdlffjhcr4i43sfajxcvx3lvnkryh5y-stdenv-linux
  /nix/store/v379zfyn6473hcy2nvlam0vkn120gfbp-gnumake-4.4.1
  /nix/store/xxpqzipy93i49sgvm6rl8b9lm1p0bx9b-patchelf-0.15.0
copying path '/nix/store/087609j187svcvxi5rn0jk3b9rh9pm24-file-5.44' from 'https://cache.nixos.org'...
copying path '/nix/store/v379zfyn6473hcy2nvlam0vkn120gfbp-gnumake-4.4.1' from 'https://cache.nixos.org'...
copying path '/nix/store/xxpqzipy93i49sgvm6rl8b9lm1p0bx9b-patchelf-0.15.0' from 'https://cache.nixos.org'...
copying path '/nix/store/5wdlffjhcr4i43sfajxcvx3lvnkryh5y-stdenv-linux' from 'https://cache.nixos.org'...
 - system: `"x86_64-linux"`
 - host os: `Linux 6.1.34, NixOS, 23.05 (Stoat), 23.05.1272.ecb441f2206`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.13.3`
 - channels(x80486): `"home-manager-23.05.tar.gz"`
 - channels(root): `"nixos-23.05"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[me00001]

it's an old and critical issue, you can close this issue and follow the old one #138956