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cage: fails to start #468366

@brianmay

Description

@brianmay

Nixpkgs version

  • Stable (25.11)

Describe the bug

After upgrading from 25.05 to 25.11 my cage instances, configured with services.cage fail to start.

Example is starting mythtv frontend. It loooks like mythtv is the same version in both 25.05 and 25.11.

Plan to investigate more, time permitting.

Have downgraded back to 25.05 and it is working again.

Steps to reproduce

Have working cage instance on 25.05 and upgrade to 25.11.

Expected behaviour

Cage should start as before.

Screenshots

No response

Relevant log output

Dec 06 19:37:36 minithink systemd[1]: Started cage-tty1.service.
Dec 06 19:37:36 minithink (cage)[776]: pam_unix(cage:session): session opened for user mythtv-frontend(uid=1003) by mythtv-frontend(uid=0)
Dec 06 19:37:45 minithink systemd[1]: cage-tty1.service: Main process exited, code=dumped, status=6/ABRT
Dec 06 19:37:45 minithink systemd[1]: cage-tty1.service: Failed with result 'core-dump'.
Dec 06 19:37:45 minithink systemd[1]: cage-tty1.service: Consumed 12ms CPU time, 4.7M memory peak, 2.5M read from disk.

Additional context

No response

System metadata

  • system: "x86_64-linux"
  • host os: Linux 6.12.55, NixOS, 25.05 (Warbler), 25.05.20251027.daf6dc4
  • multi-user?: yes
  • sandbox: yes
  • version: nix-env (Nix) 2.28.5
  • nixpkgs: /nix/store/l6dvcwx15645vi6dj9i8b3h7w4dzai0p-source

(after downgrading)

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