d-i debian-installer/locale string fr_CH.UTF-8
d-i keyboard-configuration/model select PC générique 105 touches (intl)
d-i keyboard-configuration/layout select fr
d-i keyboard-configuration/variant select latin9

d-i netcfg/choose_interface select auto
d-i netcfg/get_hostname string unassigned-hostname
d-i netcfg/get_domain string unassigned-domain
d-i netcfg/wireless_wep string

d-i mirror/country string manual
d-i mirror/http/hostname string deb.debian.org
d-i mirror/http/directory string /debian
d-i mirror/http/proxy string

d-i passwd/root-login boolean false
d-i passwd/make-user boolean true

d-i clock-setup/utc boolean true
d-i time/zone string Europe/Zurich
d-i clock-setup/ntp boolean true

d-i partman-auto/method string lvm
d-i partman-auto/disk string /dev/sda
d-i partman-auto-lvm/guided_size string max
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman-auto/choose_recipe select atomic
d-i partman-auto/expert_recipe string                         \
      btrfs-root ::                                          \
              512 512 512 free                               \
                      $iflabel{ gpt }                         \
                      $reusemethod{ }                         \
                      method{ efi }                           \
                      format{ }                               \
              .                                               \
              500 10000 -1 btrfs                              \
                      $primary{ } $bootable{ }                \
                      method{ format } format{ }              \
                      use_filesystem{ } filesystem{ btrfs }   \
                      mountpoint{ / }                         \
              .

d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
d-i partman-basicfilesystems/no_swap boolean false
d-i partman-md/confirm boolean true

d-i apt-setup/cdrom/set-first boolean false

tasksel tasksel/first multiselect minimal
d-i pkgsel/include string openssh-server

d-i grub-installer/only_debian boolean true
d-i grub-installer/with_other_os boolean true
d-i grub-installer/bootdev string /dev/sda

d-i finish-install/reboot_in_progress