penguins-eggs/conf/distros/focal/calamares/modules/mount.yaml

A remaster system tool, compatible with Almalinux, Alpine, Arch, Debian, Devuan, Fedora, Manjaro, Opensuse, Ubuntu and derivatives

# calamares 3.2.x
---
extraMounts:
    - device: proc
      fs: proc
      mountPoint: /proc
    - device: sys
      fs: sysfs
      mountPoint: /sys
    - device: /dev
      mountPoint: /dev
      options: bind
    - device: tmpfs
      fs: tmpfs
      mountPoint: /run

extraMountsEfi:
    - device: efivarfs
      fs: efivarfs
      mountPoint: /sys/firmware/efi/efivars