[Guix System] Can't run VM script because of KVM kernel module permission

[Jérémy Korwin-Zmijowski]

Hey Guixters !

On my laptop running Guix System, I try to execute a VM from the script
generated by "guix system vm". But I issue the following message :

$ /gnu/store/dxrwz82s34zi33n9h9cpn8sqw5pv4qyz-run-vm.sh
Could not access KVM kernel module: Permission denied
qemu-system-x86_64: failed to initialize kvm: Permission denied

I already add builders to the kvm group as stated in /etc/group :

kvm:x:984:guixbuilder01,guixbuilder02,guixbuilder03,guixbuilder04,guixb
uilder05,guixbuilder06,guixbuilder07,guixbuilder08,guixbuilder09,guixbu
ilder10
guixbuild:x:30000:guixbuilder01,guixbuilder02,guixbuilder03,guixbuilder
04,guixbuilder05,guixbuilder06,guixbuilder07,guixbuilder08,guixbuilder0
9,guixbuilder10

What do I miss ? :/

Cheers,
Jérémy