89fe44a Fix flatpak build

Authored and Committed by yselkowitz a year ago
    Fix flatpak build
    udev nowadays is provided by systemd-udev, meaning that it is
    already installed as part of a booting system, but flatpaks use
    the host rather than their own instance.  Flatpak builds also
    install into the /app prefix.
file modified
+3 -1