diff --git a/install_yunohost b/install_yunohost
index f96e0f3..8e02168 100755
--- a/install_yunohost
+++ b/install_yunohost
@@ -231,6 +231,9 @@ function check_assertions()
     # Assert we're root
     [[ "$(id -u)" == "0" ]] || die "This script must be run as root. On most setups, typing 'sudo -i' can be used to become root."
 
+    # Check PATH var
+    [[ "$PATH" == *"/sbin"* ]] || die "Your environment PATH variable must contains /sbin directory."
+    
     # Assert systemd is installed
     command -v systemctl > /dev/null || die "YunoHost requires systemd to be installed."
 
@@ -301,7 +304,7 @@ function upgrade_system() {
 
 function install_script_dependencies() {
     # dependencies of the install script itself
-    local DEPENDENCIES="lsb-release wget whiptail gnupg apt-transport-https"
+    local DEPENDENCIES="lsb-release wget whiptail gnupg apt-transport-https adduser"
 
     if [[ "$AUTOMODE" == "0" ]] ;
     then