Chroot vm build doc update

.gitignore

@@ -14,4 +14,5 @@ examples/boot_efi
 examples/external_kernel
 examples/nitro
 examples/consoles
+examples/rootfs_fedora
 test-prefix

README.md

@@ -214,6 +214,20 @@ This is a simple example providing ```chroot```-like functionality using ```libk
 
 #### Building chroot_vm
 
+To be able to ```chroot_vm```, you need need to build libkrun with the `virtio-block` and `virtio-net` optional features:
+
+```
+make BLK=1 NET=1
+```
+
+then
+
+```
+sudo make BLK=1 NET=1 install
+```
+
+you can then build `chroot_vm`:
+
 ```
 cd examples
 make
@@ -244,7 +258,7 @@ If the ```libkrun``` and/or ```libkrunfw``` libraries were installed on a path t
 To avoid this problem, use the ```LD_LIBRARY_PATH``` environment variable to point to the location where the libraries were installed. For example, if the libraries were installed in ```/usr/local/lib64```, use something like this:
 
 ```
-LD_LIBRARY_PATH=/usr/local/lib64 ./chroot_vm rootfs/ /bin/sh
+LD_LIBRARY_PATH=/usr/local/lib64 ./chroot_vm rootfs_fedora/ /bin/sh
 ```
 
 ## Status