diff --git a/scripts/install b/scripts/install
index c7a97fa..91f8b3a 100755
--- a/scripts/install
+++ b/scripts/install
@@ -45,8 +45,8 @@ ynh_script_progression --message="Building app... (this will take some time and
 
 pushd "$install_dir"
 	ynh_use_nodejs
-	ynh_exec_warn_less npm i -g npm
-	ynh_exec_warn_less npm install --production
+	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH $ynh_npm i -g npm
+	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH $ynh_npm install --production
 popd
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 0653676..a9e2a59 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -60,8 +60,8 @@ ynh_script_progression --message="Building app... (this will take some time and
 
 pushd "$install_dir"
 	ynh_use_nodejs
-	ynh_exec_warn_less npm i -g npm
-	ynh_exec_warn_less npm install --production
+	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH $ynh_npm i -g npm
+	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH $ynh_npm install --production
 popd
 
 #=================================================