diff --git a/generate/src/entrypoint.sh b/generate/src/entrypoint.sh
index 95238521a..16f760aec 100644
--- a/generate/src/entrypoint.sh
+++ b/generate/src/entrypoint.sh
@@ -2,6 +2,8 @@
 
 set -e
 
+LOOPBACK_DEVICE=$(losetup -f)
+
 function size() {
   du -sm ./ | cut -f1
 }
@@ -27,13 +29,13 @@ function raw() {
   parted -s -a optimal /dianemo.raw mkpart ESP fat32 0 50M
   parted -s -a optimal /dianemo.raw mkpart ROOT xfs 50M $(($(size) + 100))M
   parted -s -a optimal /dianemo.raw mkpart DATA xfs $(($(size) + 100))M 100%
-  losetup /dev/loop0 /dianemo.raw
-  partx -av /dev/loop0
-  sgdisk /dev/loop0 --attributes=1:set:2
-  mkfs.vfat /dev/loop0p1
-  mkfs.xfs -n ftype=1 -L ROOT /dev/loop0p2
-  mkfs.xfs -n ftype=1 -L DATA /dev/loop0p3
-  mount /dev/loop0p1 /mnt
+  losetup ${LOOPBACK_DEVICE} /dianemo.raw
+  partx -av ${LOOPBACK_DEVICE}
+  sgdisk ${LOOPBACK_DEVICE} --attributes=1:set:2
+  mkfs.vfat ${LOOPBACK_DEVICE}p1
+  mkfs.xfs -n ftype=1 -L ROOT ${LOOPBACK_DEVICE}p2
+  mkfs.xfs -n ftype=1 -L DATA ${LOOPBACK_DEVICE}p3
+  mount ${LOOPBACK_DEVICE}p1 /mnt
   mkdir -p /mnt/boot/extlinux
   extlinux --install /mnt/boot/extlinux
   cat <<EOF >/mnt/boot/extlinux/extlinux.conf
@@ -46,14 +48,14 @@ LABEL Dianemo
 EOF
   cp -v /rootfs/boot/* /mnt/boot
   umount /mnt
-  mount /dev/loop0p2 /mnt
+  mount ${LOOPBACK_DEVICE}p2 /mnt
   cp -Rv ./* /mnt
   rm -rf /mnt/boot
   rm -rf /mnt/var/*
   umount /mnt
-  mount /dev/loop0p3 /mnt
+  mount ${LOOPBACK_DEVICE}p3 /mnt
   cp -Rv ./var/* /mnt
-  dd if=/usr/local/src/syslinux/efi64/mbr/gptmbr.bin of=/dev/loop0
+  dd if=/usr/local/src/syslinux/efi64/mbr/gptmbr.bin of=${LOOPBACK_DEVICE}
   cleanup
   cp -v /dianemo.raw /out
   qemu-img convert -f raw -O vmdk /out/dianemo.raw /out/dianemo.vmdk
@@ -64,16 +66,16 @@ function rootfs() {
   parted -s /rootfs.raw mklabel gpt
   parted -s -a optimal /rootfs.raw mkpart ROOT xfs 0 $(($(size) + 50))M
   parted -s -a optimal /rootfs.raw mkpart DATA xfs $(($(size) + 50))M 100%
-  losetup /dev/loop0 /rootfs.raw
-  partx -av /dev/loop0
-  mkfs.xfs -n ftype=1 -L ROOT /dev/loop0p1
-  mkfs.xfs -n ftype=1 -L DATA /dev/loop0p2
-  mount /dev/loop0p1 /mnt
+  losetup ${LOOPBACK_DEVICE} /rootfs.raw
+  partx -av ${LOOPBACK_DEVICE}
+  mkfs.xfs -n ftype=1 -L ROOT ${LOOPBACK_DEVICE}p1
+  mkfs.xfs -n ftype=1 -L DATA ${LOOPBACK_DEVICE}p2
+  mount ${LOOPBACK_DEVICE}p1 /mnt
   cp -Rv ./* /mnt
   rm -rf /mnt/boot
   rm -rf /mnt/var/*
   umount /mnt
-  mount /dev/loop0p2 /mnt
+  mount ${LOOPBACK_DEVICE}p2 /mnt
   cp -Rv ./var/* /mnt
   cleanup
   cp -v ./boot/vmlinuz /out
@@ -83,8 +85,8 @@ function rootfs() {
 
 function cleanup {
   umount /mnt || true
-  partx -dv /dev/loop0 || true
-  losetup -d /dev/loop0 || true
+  partx -dv ${LOOPBACK_DEVICE} || true
+  losetup -d ${LOOPBACK_DEVICE} || true
 }
 
 trap cleanup EXIT