[for `npm test` electron src] No module named 'dbusmock' and 'gi'

Ran `e init --root=~/electron --bootstrap testing` to get an initial Electron build

Made changes to Electron code for https://github.com/electron/electron/pull/49290

Ran `e build`, it works

---

Tried to run `npm test` in electron/src/electron directory

---

Says it's missing node_headers in gen folder

Ran `e build --target electron:node_headers`

Now it says

```
Running: Main process specs
Running: python3 /home/alex/electron/src/electron/script/dbus_mock.py /home/alex/electron/src/out/Testing/electron electron/spec
Traceback (most recent call last):
File "/home/alex/electron/src/electron/script/dbus_mock.py", line 7, in
from dbusmock import DBusTestCase
ModuleNotFoundError: No module named 'dbusmock'
✗ Electron tests failed with code 1.
```

---

Additionally

```
ModuleNotFoundError: No module named 'gi'
```

showed up when running the same script as above after the above steps

---

OS: Fedora 43
NodeJS: v22.21.1