diff --git a/README.md b/README.md
index a573059..f1fafba 100644
--- a/README.md
+++ b/README.md
@@ -595,14 +595,16 @@ After everything has been installed and preconfigured in the **chrooted** enviro
 
    ```shell
    (
-      cd isolinux && \
-      dd if=/dev/zero of=efiboot.img bs=1M count=10 && \
-      sudo mkfs.vfat efiboot.img && \
-      mkdir efi && \
-      sudo mount efiboot.img efi && \
-      sudo grub-install --efi-directory=efi --uefi-secure-boot --removable --no-nvram && \
-      sudo umount efi && \
-      rm -rf efi
+     cd isolinux && \
+     dd if=/dev/zero of=efiboot.img bs=1M count=10 && \
+     sudo mkfs.vfat efiboot.img && \
+     LOOP_DEVICE=`losetup --find --show $PWD/efiboot.img` && \
+     mkdir efi && \
+     sudo mount $LOOP_DEVICE efi && \
+     sudo grub-install --efi-directory=efi --uefi-secure-boot --removable --no-nvram $LOOP_DEVICE && \
+     sudo umount $LOOP_DEVICE && \
+     sudo losetup --detach $LOOP_DEVICE && \
+     rm -rf efi
    )
    ```