steam: gamescope: scopebuddy: perl: Permission denied

[djspacewhale]

Is your feature request related to a problem? Please describe.

Games configured to launch with the Gamescope compositor, wrapped using Scopebuddy, do not launch. Here is an example attempting to launch Dispatch:

...
reaping pid: 149 -- steam
fsync: up and running.
...
Adding process 878 for gameID 2592160
pid 883 != 878, skipping destruction (fork without exec?)
/usr/bin/scb: line 492: /usr/bin/perl: Permission denied
...

Describe the solution you'd like

Allow Scopebuddy through the sandbox to enable this compatibility in Steam.

Environment

• Name/version/arch of the Linux kernel (uname -srm): Linux 6.18.3-zen1-1-zen x86_64
• Name/version of the Linux distribution (e.g. "Ubuntu 20.04" or "Arch Linux"): Arch Linux
• Version of Firejail (firejail --version): 0.9.78
• If you use a development version of firejail, also the commit from which it:
  was compiled (git rev-parse HEAD): n/a

[kmk3]

Basic debugging information is missing; please follow the bug report template:

• https://github.com/netblue30/firejail/issues/new?template=bug_report.md