Running Script Before Game - Command does not exist

Hello, I'm trying to run a bash script before running this abandonware game so it mounts the disk automatically.

The contents of the script are just:

#!/bin/bash

udisksctl loop-setup -f /home/deck/Applications/CookiesBustle/cookiesbustle.iso && udisksctl mount -b /dev/loop0

#!/bin/bash

udisksctl loop-setup -f /home/deck/Applications/CookiesBustle/cookiesbustle.iso && udisksctl mount -b /dev/loop0

#!/bin/bash

udisksctl loop-setup -f /home/deck/Applications/CookiesBustle/cookiesbustle.iso && udisksctl mount -b /dev/loop0

#!/bin/bash

udisksctl loop-setup -f /home/deck/Applications/CookiesBustle/cookiesbustle.iso && udisksctl mount -b /dev/loop0

Heroic is saying the

udisksctl

udisksctl

udisksctl

udisksctl command does not exist though, I've attached the log and the error mentioned is at the top. Script works fine outside of heroic, the command works fine directly from a terminal.

Script works fine outside of heroic

I'm on a Steam Deck, using the Flatpak.

launch.log11.5KB

awake-maroon•12/19/25, 4:33 PM

that's a normal issue when using flatpak in general, flatpaks are isolated from the system by default so you'll have to use something like Flatseal to change Heroic's flatpak permissions and grant it access to where that utility works

dry-scarletOP•12/19/25, 4:34 PM

Oooh gotcha, how would I find that location?

dry-scarletOP•12/19/25, 4:35 PM

Oh I see /usr/bin/udisksctl/usr/bin/udisksctl

dry-scarletOP•12/19/25, 4:36 PM

Can I give permissions to just the program and not the entire bin folder?

awake-maroon•12/19/25, 4:53 PM

I don't think so, you'll also need to grant permissions to whatever that program wants to access to

dry-scarletOP•12/19/25, 4:53 PM

What do you mean by that?

awake-maroon•12/19/25, 4:55 PM

like... if that udisdkctludisdkctl tool internally calls another system binary, that will also need access, so it's probably easier to just give read access to the whole folder instead

dry-scarletOP•12/19/25, 4:59 PM

Seems like it's still not picking it up? Same error, I also explicitly wrote out /usr/bin/udisksctl/usr/bin/udisksctl and that didn't work either

dry-scarletOP•12/19/25, 5:01 PM

Making sure to restart heroic each time too

awake-maroon•12/19/25, 5:01 PM

hmmm I wonder if then the issue is that it needs to be installed into what the flatpak runtime can see, but I don't really know how to do that

dry-scarletOP•12/19/25, 5:01 PM

Ah, I copied it to ~/.local/bin~/.local/bin and that worked which makes sense but feels a little clunky

dry-scarletOP•12/19/25, 5:02 PM

And no updates if there are any in the future, no idea if this program is even updated frequently

dry-scarletOP•12/19/25, 5:04 PM

Oh this worked, https://old.reddit.com/r/flatpak/comments/utc6yl/give_flatpak_application_access_to_usrbin_etc_and/jcu31c3/

dry-scarletOP•12/19/25, 5:06 PM

Well it says the command works but the game isn't happy, works if I use ~/.local/bin~/.local/bin hm

dry-scarletOP•12/19/25, 5:16 PM

Is there a way to run a command before the game launches directly in heroic? I see the launch arguments but that seems to come after

awake-maroon•12/19/25, 5:22 PM

wrapper commands come before

dry-scarletOP•12/19/25, 5:42 PM

Flatpaks can sure be confusing sometimes

dry-scarletOP•12/19/25, 5:45 PM

So this works but am I just punching a big security hole in my system by doing this? Or is this ok to do?

Eemotion So this works but am I just punching a big security hole in my system by doing t...

CommandMC•12/19/25, 5:47 PM

You are essentially disabling the sandbox, yes. There is no way to achieve what you want to achieve without it though

CommandMC•12/19/25, 5:48 PM

Note that you may be able to extract the ISO file and add the extracted folder as a drive in winecfg (button in the game settings), then you wouldn't need the script

dry-scarletOP•12/19/25, 5:48 PM

Oh didn't think of that, let me go try

dry-scarletOP•12/19/25, 5:52 PM

Doesn't seem to work

awake-maroon•12/19/25, 6:03 PM

you might need some no-cd patch if you extract things, some games expect the CD otherwise

dry-scarletOP•12/19/25, 6:19 PM

Doesn't seem like one exists for this game but I can look a bit more deeply in a bit

dry-scarletOP•12/19/25, 6:20 PM

Ended up editing fstab and I think breaking my system whoops

dry-scarletOP•12/19/25, 9:42 PM

Well fstab seems like the most sane and safest solution to this if you do it correctly, strange there's no safer solution from flatpak or proton/wine? Maybe in the far future

dry-scarletOP•12/19/25, 9:43 PM

I have this currently /home/deck/Games/CookiesBustle/cookiesbustle.iso /mnt/cookiesbustle iso9660 nofail,loop,ro,auto 0 0/home/deck/Games/CookiesBustle/cookiesbustle.iso /mnt/cookiesbustle iso9660 nofail,loop,ro,auto 0 0 in my fstab, does that look ok? Works fine, just double checking

Running Script Before Game - Command does not exist

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