diff --git a/scripts/install b/scripts/install
index 204de79..26da2f2 100644
--- a/scripts/install
+++ b/scripts/install
@@ -57,7 +57,8 @@ ynh_app_setting_set "$app" port "$port"
 #=================================================
 
 ynh_install_app_dependencies dh-autoreconf \
-	python-pip python-dev python-lxml python-imaging python-virtualenv
+	python-pip python-dev python-lxml python-imaging python-virtualenv \
+	libxslt-dev libjpeg-dev libxml2-dev
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
@@ -102,7 +103,7 @@ ynh_install_nodejs 8
 # Install weboob with pip
 #=================================================
 
-virtualenv "${final_path}/venv"
+virtualenv --system-site-packages "${final_path}/venv"
 (
 	set +o nounset
 	source "${final_path}/venv/bin/activate"
diff --git a/scripts/restore b/scripts/restore
index a15f904..086e7b2 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -77,7 +77,8 @@ chmod 600 "$final_path/config.ini"
 
 # Define and install dependencies
 ynh_install_app_dependencies dh-autoreconf \
-	python-pip python-dev python-lxml python-imaging python-virtualenv
+	python-pip python-dev python-lxml python-imaging python-virtualenv \
+	libxslt-dev libjpeg-dev libxml2-dev
 
 #=================================================
 # INSTALL NODEJS
diff --git a/scripts/upgrade b/scripts/upgrade
index bc1f861..536b0e6 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -68,7 +68,8 @@ path_url=$(ynh_normalize_url_path $path_url)
 #=================================================
 
 ynh_install_app_dependencies dh-autoreconf \
-	python-pip python-dev python-lxml python-imaging python-virtualenv
+	python-pip python-dev python-lxml python-imaging python-virtualenv \
+	libxslt-dev libjpeg-dev libxml2-dev
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
@@ -111,7 +112,7 @@ ynh_install_nodejs 8
 # Install weboob with pip
 #=================================================
 
-virtualenv "${final_path}/venv"
+virtualenv --system-site-packages "${final_path}/venv"
 (
 	set +o nounset
 	source "${final_path}/venv/bin/activate"