How to set trackpoint sensitivity?

Using KDE, how do I increase the sensitivity of my trackpoint? There is no trackpoint section in Systemsettings. The "Pointer speed" sliders in the Mouse and Touchpad sections don't affect it either. xinput set-prop 'TPPS/2 Elan TrackPoint' 'libinput Accel Speed' 1 works temporarily, but the setting is reset after every hibernate/resume cycle (and possibly on other occasions).