diff --git a/public/service-hydra-build.nix b/public/service-hydra-build.nix
index 5c75d34..c9a6c6e 100644
--- a/public/service-hydra-build.nix
+++ b/public/service-hydra-build.nix
@@ -28,7 +28,11 @@ mkIf cfg.hydra-builder {
   users.users."hydrabld" = {
     description = "Execution des jobs hydra";
     group = "nixbld";
-    extraGroups = [ "nixbld" ];
+    extraGroups = [
+      "docker"
+      "nixbld"
+      "vboxusers"
+    ];
     isNormalUser = true;  # devrait être à false: TODO débugger la conf ssh & users pour que ça marche en user système
 
     openssh.authorizedKeys.keys = [