gir1.2-vte-2.91 software package provides GObject introspection data for the VTE library, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gir1.2-vte-2.91
gir1.2-vte-2.91 is installed in your system.
Make ensure the gir1.2-vte-2.91 package were installed using the commands given below,
$ sudo dpkg-query -l | grep gir1.2-vte-2.91 *
You will get with gir1.2-vte-2.91 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Introspection |
| Package | gir1.2-vte-2.91 |
| Version | 0.46.0-1 |
| Description | GObject introspection data for the VTE library |
| Sub Section | Introspection |