diff --git a/conf/garage.toml b/conf/garage.toml
index beb3a68..04df5f6 100644
--- a/conf/garage.toml
+++ b/conf/garage.toml
@@ -1,5 +1,6 @@
 metadata_dir = "/opt/yunohost/__APP__/metadata"
 data_dir = "__DATADIR__" 
+virtualization = "__VIRTUALIZATION__" 
 
 block_size = 1048576
 block_manager_background_tranquility = 2
diff --git a/manifest.json b/manifest.json
index 4af1b22..34d621f 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "S3 storage",
         "fr": "stockage S3"
     },
-    "version": "0.7.3~ynh1",
+    "version": "0.7.3~ynh2",
     "url": "https://garagehq.deuxfleurs.fr/",
     "upstream": {
         "license": "free",
@@ -69,6 +69,16 @@
                     "fr": "dossier de stockage des données"
                     }
             }
+            {
+                "name": "virtualization",
+                "type": "boolean",
+                "default": "true",
+                "exemple": "false",
+                "ask" : {
+                    "en" : "use virtual disk to constrain data size",
+                    "fr": "utiliser un disque virtuel pour limiter la taille des données"
+                    }
+            }
         ]
     }
 }
diff --git a/scripts/install b/scripts/install
index b88eb6b..4612abf 100755
--- a/scripts/install
+++ b/scripts/install
@@ -33,6 +33,7 @@ rpc_secret=$YNH_APP_ARG_RPC_SECRET
 bootstrap_peers=$YNH_APP_ARG_BOOTSTRAP_PEERS
 datadir=$YNH_APP_ARG_DATADIR
 weight=$YNH_APP_ARG_WEIGHT
+virtualization=$YNH_APP_ARG_VIRTUALIZATION
 
 
 ### If it's a multi-instance app, meaning it can be installed several times independently
@@ -95,10 +96,7 @@ ynh_script_progression --message="Checking virtualisation availability…" --tim
 if [  "$(which modprobe)" = ""  ] 
 then
 	virtualisation=false
-else
-	virtualisation=true
 fi
-ynh_app_setting_set --app=$app --key=virtualisation --value=true
 
 #=================================================
 # STORE SETTINGS FROM MANIFEST
@@ -109,6 +107,7 @@ ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=rpc_secret --value=$rpc_secret
 ynh_app_setting_set --app=$app --key=datadir --value=$datadir
 ynh_app_setting_set --app=$app --key=bootstrap_peers --value=$bootstrap_peers
+ynh_app_setting_set --app=$app --key=virtualisation --value=$virtualisation
 
 
 #=================================================