Added back --system

Author: KillianLucas

installers/new-installer.sh

@@ -24,7 +24,7 @@ uv python install "$PYTHON_VERSION"
 
 # Direct installation using uv with specific Python version
 echo "Installing package..."
-uv pip install --python "$PYTHON_VERSION" "git+$REPO_URL@$BRANCH"
+uv pip install --system --python "$PYTHON_VERSION" "git+$REPO_URL@$BRANCH"
 
 echo
 echo "Installation complete!"