diff --git a/config.scm b/config.scm
index c49efce..b52d2e4 100644
--- a/config.scm
+++ b/config.scm
@@ -11,44 +11,80 @@
 ;; utilisées dans cette configuration.
 (use-modules (gnu))
 (use-modules (gnu packages freedesktop))
-(use-service-modules cups desktop networking ssh xorg)
+(use-service-modules cups desktop networking ssh xorg virtualization vpn)
 
+;; Définitions
+
+(define %sudoers-specification
+  (plain-file "sudoers" "\
+root ALL=(ALL) ALL
+%wheel ALL=(ALL) NOPASSWD: ALL
+"))
+
+(define %spice-rules
+  (udev-rule
+    "50-spice.rules"
+    (string-append "\
+SUBSYSTEM==\"usb\", GROUP=\"spice\", MODE=\"0660\"
+SUBSYSTEM==\"usb_device\", GROUP=\"spice\", MODE=\"0660\"
+")))
+
+;; CONF
 (operating-system
   (locale "fr_FR.utf8")
   (timezone "Europe/Paris")
   (keyboard-layout (keyboard-layout "fr" "oss"))
   (host-name "n-guix-port")
 
+  (sudoers-file %sudoers-specification)
+
   ;; La liste des comptes utilisateurs (« root » est implicite).
   (users (cons* (user-account
                   (name "neox")
                   (comment "neox")
                   (group "users")
                   (home-directory "/home/neox")
-                  (supplementary-groups '("wheel" "netdev" "audio" "video")))
+                  (supplementary-groups '("wheel" "netdev" "audio" "video" "libvirt" "kvm" "scanner" "spice")))
                 %base-user-accounts))
 
   ;; Packages installed system-wide.  Users can also install packages
   ;; under their own account: use 'guix search KEYWORD' to search
   ;; for packages and 'guix install PACKAGE' to install a package.
-  (packages (append (list (specification->package "nss-certs"))
+  (packages (append (list (specification->package "nss-certs")
+                          (specification->package "qemu")
+                          (specification->package "virt-manager")
+                          (specification->package "libvirt") 
+                          (specification->package "lvm2") 
+                          (specification->package "mdadm") 
+                          (specification->package "network-manager")
+                          (specification->package "network-manager-openvpn"))
                     %base-packages))
 
   ;; Voici la liste des services du système.  Pour trouver les services disponibles,
   ;; lancez « guix system search MOT-CLÉ » dans un terminal.
   (services
-   (append (list (service gnome-desktop-service-type)
+    (modify-services 
+             (append 
+               (list 
+                 (service gnome-desktop-service-type)
                  (service cups-service-type)
+                 (service libvirt-service-type)
+                 (udev-rules-service 'spice %spice-rules #:groups '("spice"))
+                 (service virtlog-service-type)
 		 (pam-limits-service
 		   (list
 		     (pam-limits-entry "@audio" 'both 'rtprio 99)
                      (pam-limits-entry "@audio" 'both 'memlock 'unlimited)))
                  (set-xorg-configuration
                   (xorg-configuration (keyboard-layout keyboard-layout))))
+               %desktop-services)
+
+      (network-manager-service-type config => (network-manager-configuration 
+        (inherit config)
+        (vpn-plugins
+        (list (specification->package "network-manager-openvpn")))))))
+
 
-           ;; Voici la liste des services par défaut à laquelle nous
-           ;; ajoutons nos propres services.
-           %desktop-services))
   (bootloader (bootloader-configuration
                 (bootloader grub-efi-bootloader)
                 (targets (list "/boot/efi"))