Deps Update and Test Removed

docs/troubleshooting.md

@@ -117,6 +117,25 @@ source activate_venv.sh
 pip install -r requirements.txt
 ```
 
+### Build Failed (Missing pexpect/future)
+
+**Symptoms:**
+- "you need to install pexpect with 'python3 -m pip install pexpect'"
+- "ModuleNotFoundError: No module named 'future'"
+- `install-prereqs-ubuntu.sh` fails with "Can not perform a '--user' install"
+
+**Solution:**
+This usually happens if the virtual environment is active during the build process but lacks dependencies.
+
+```bash
+# Deactivate any active virtualenv
+deactivate
+
+# helper to install missing deps into venv
+source activate_venv.sh
+pip install pexpect future
+```
+
 ## WSL-Specific Issues
 
 ### Display Not Available