diff --git a/conf/systemd.service b/conf/systemd.service
index 52a6375..64633e2 100755
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -8,8 +8,7 @@ User=__APP__
 Group=__APP__
 WorkingDirectory=__FINALPATH__
 Environment='NODE_ENV=production'
-Environment="__YNH_NODE_LOAD_PATH__"
-ExecStart=__YNH_NODE_LOAD_PATH__ __FINALPATH__ mynewwiki --listen port=__PORT__ #authenticated-user-header=basic
+ExecStart=__YNH_NODE__ mynewwiki --listen port=__PORT__ #authenticated-user-header=basic
 Restart=always
 
 [Install]
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 7912aa4..d7982dd 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -17,3 +17,16 @@ nodejs_version=14
 #=================================================
 # FUTURE OFFICIAL HELPERS
 #=================================================
+
+# Execute a command as another user
+# usage: ynh_exec_as USER COMMAND [ARG ...]
+ynh_exec_as() {
+  local USER=$1
+  shift 1
+
+  if [[ $USER = $(whoami) ]]; then
+    eval "$@"
+  else
+    sudo -u "$USER" "$@"
+  fi
+}
diff --git a/scripts/install b/scripts/install
index 74b7fa3..da77163 100755
--- a/scripts/install
+++ b/scripts/install
@@ -98,7 +98,8 @@ ynh_script_progression --message="Configuring TiddlyWiki..." --weight=2
 
 pushd $final_path
 	ynh_use_nodejs
-	ynh_npm install -g tiddlywiki
+	#ynh_npm install -g tiddlywiki
+	ynh_exec_as $app $ynh_node_load_PATH $ynh_npm install -g tiddlywiki
 	tiddlywiki mynewwiki --init server
  popd