Linux fails to boot in QEMU VMs when UTM is installed by Nix

[Enzime]

Describe the issue

When I install UTM through Nix and then create a QEMU Linux VM I get the following error:

QEMU error: QEMU exited from an error: qemu-aarch64-softmmu: -drive if=pflash,unit=1,file=/Users/enzime/Library/Containers/com.utmapp.UTM/Data/Documents/Linux 2.utm/Data/efi_vars.fd: Could not open '/Users/enzime/Library/Containers/com.utmapp.UTM/Data/Documents/Linux 2.utm/Data/efi_vars.fd': Permission denied

$ ls -l ~/Library/Containers/com.utmapp.UTM/Data/Documents/Linux\ 2.utm/Data/efi_vars.fd
-r--r--r--@ 1 enzime  staff  334848 Jan  1  1970 /Users/enzime/Library/Containers/com.utmapp.UTM/Data/Documents/Linux 2.utm/Data/efi_vars.fd

The permissions and creation date indicate the file is getting copied from the Nix Store which is readonly

If I run:

$ chmod u+w ~/Library/Containers/com.utmapp.UTM/Data/Documents/Linux\ 2.utm/Data/efi_vars.fd

Then the VM works perfectly fine

Related: https://github.com/NixOS/nixpkgs/issues/244663

Configuration

• UTM Version: 4.5.4 (100) from Nix
• macOS Version: 15.0
• Mac Chip (Intel, M1, ...): M1

Debug log

debug.log

[osy]

Please update to 15.0.1 and try again

[Enzime]

I've just updated to 15.0.1 and I still get the same error

[osy]

Can you update to 15.1?

[Enzime]

Same issue

[n8henrie]

Until this is released and the package updated in nixpkgs, it looks like the closing PR essentially does this:

$ chmod u+w ~/Library/Containers/com.utmapp.UTM/Data/Documents/nixos-qemu.utm/Data/efi_vars.fd

Running that manually resolved the error for me.