diff --git a/README.md b/README.md
index 0900cd0..7367f65 100644
--- a/README.md
+++ b/README.md
@@ -49,10 +49,29 @@ lxc-checkconfig
 echo "veth" | sudo tee -a /etc/modules
 ```
 
-On Debian Buster, I had to re-patch the driver.rb of vagrant-lxc plugin with [this version](https://raw.githubusercontent.com/fgrehm/vagrant-lxc/2a5510b34cc59cd3cb8f2dcedc3073852d841101/lib/vagrant-lxc/driver.rb) (especially the `roofs_path` function). I also had to install `apparmor` then `systemctl restart apparmor` for `lxc-start` to work.
+On Debian Buster, I had to re-patch the driver.rb of vagrant-lxc plugin with [this version](https://raw.githubusercontent.com/fgrehm/vagrant-lxc/2a5510b34cc59cd3cb8f2dcedc3073852d841101/lib/vagrant-lxc/driver.rb) (especially the `roofs_path` function). I also had to install `apparmor` then `systemctl restart apparmor` for `lxc-start` to work. Also check instruction on https://feeding.cloud.geek.nz/posts/lxc-setup-on-debian-stretch/
 
 If you run Archlinux, this page should be quite useful to setup LXC : https://github.com/fgrehm/vagrant-lxc/wiki/Usage-on-Arch-Linux-hosts
 
+Typically `/etc/default/lxc-net` and `/etc/lxc/default.conf` should look like this : 
+
+```
+ > cat /etc/default/lxc-net
+USE_LXC_BRIDGE="true"
+LXC_BRIDGE="lxcbr0"
+LXC_ADDR="10.0.3.1"
+LXC_NETMASK="255.255.255.0"
+LXC_NETWORK="10.0.3.0/24"
+LXC_DHCP_RANGE="10.0.3.2,10.0.3.254"
+LXC_DHCP_MAX="253"
+
+> cat /etc/lxc/default.conf
+lxc.net.0.type = veth
+lxc.net.0.link = lxcbr0
+lxc.net.0.flags = up
+lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
+```
+
 Then, go into your favorite development folder and deploy ynh-dev with : 
 
 ```bash
diff --git a/prebuild/prebuild.sh b/prebuild/prebuild.sh
index 99aaeb7..72cee74 100755
--- a/prebuild/prebuild.sh
+++ b/prebuild/prebuild.sh
@@ -4,7 +4,7 @@
 BOX="ynh-dev"
 
 # Create box
-vagrant up $BOX
+vagrant up $BOX --provider=lxc
 
 # Package box
 vagrant package $BOX --output /tmp/$BOX.box
diff --git a/ynh-dev b/ynh-dev
index 4c17186..9441225 100755
--- a/ynh-dev
+++ b/ynh-dev
@@ -113,6 +113,10 @@ function create_sym_link() {
 
 function start_ynhdev()
 {
+    [[ $(systemctl is-active lxc-net) == "active" ]] || critical "Service lxc-net should be running ... You probably need to fix your lxc network conf before being able to use lxc's."
+
+    ip a | grep lxcbr0 -q || critical "There is no 'lxcbr0' interface. You probably need to fix your lxc network conf before being able to use lxc's."
+
     local NAME=${1:-ynh-dev}
     local BOX_NAME="yunohost/$NAME"
     local BOX_URL="https://build.yunohost.org/yunohost-$BOX_NAME-lxc.box"
@@ -145,16 +149,20 @@ function destroy_ynhdev()
 
 function rebuild_ynhdev()
 {
+    [[ $(systemctl is-active lxc-net) == "active" ]] || critical "Service lxc-net should be running ... You probably need to fix your lxc network conf before being able to use lxc's."
+
+    ip a | grep lxcbr0 -q || critical "There is no 'lxcbr0' interface. You probably need to fix your lxc network conf before being able to use lxc's."
+
     local BOX="ynh-dev"
 
     set -x
     cd prebuild
 
     # Create box
-    vagrant up $BOX
+    vagrant up $BOX --provider=lxc || critical "Could not create the box ?"
 
     # Package box
-    vagrant package $BOX --output /tmp/$BOX.box
+    vagrant package $BOX --output /tmp/$BOX.box || critical "Could not package package the box ?"
 
     # Destroy current box
     vagrant destroy $BOX