diff --git a/post-debootstrap-installer.sh b/post-debootstrap-installer.sh
index 035c3cc..0364d8b 100755
--- a/post-debootstrap-installer.sh
+++ b/post-debootstrap-installer.sh
@@ -23,7 +23,7 @@ apt-get -y install locales
 
 ### boot
 
-apt-get -y install mdadm cryptsetup systemd systemd-sysv btrfs-progs firmware-linux lvm2
+apt-get -y install mdadm cryptsetup systemd systemd-sysv firmware-linux
 systemctl enable fstrim.timer
 
 # --force-confold because we already provide /etc/dropbear-initramfs/config
diff --git a/setup.sh b/setup.sh
index 10c3509..b12a681 100755
--- a/setup.sh
+++ b/setup.sh
@@ -25,12 +25,12 @@ unset root_pwd
 chroot=/mnt/root-unlocked
 
 # root device
-mkfs.btrfs -f /dev/mapper/root-unlocked
+mkfs.ext4 -f /dev/mapper/root-unlocked
 mkdir /mnt/root-unlocked
 mount /dev/mapper/root-unlocked /mnt/root-unlocked
 
 # boot device
-mkfs.btrfs -f "$boot"
+mkfs.ext4 -f "$boot"
 mkdir "$chroot/boot"
 mount "$boot" "$chroot/boot"