ESP32 error with ethernet only

[hwchaos]

Hi,

using a WT32-ETH01 and trying to setup my new desk via ESPHome.
However the image compilation fails if I don't setup wifi (or setup ethernet).

If my yaml contains a simple wifi config, image compilation works fine.

But if my yaml uses the following (which requires wifi to be removed from config):
ethernet: type: LAN8720 mdc_pin: GPIO23 mdio_pin: GPIO18 clk_mode: GPIO0_IN phy_addr: 1 power_pin: GPIO16
the compilation fails with reference to desk_height_sensor.h see -> logs_flexispot_upload.txt

So either the removal of wifi oder the addition of ethernet seams to break it. Sadly my programming fu is not enough for this to solve.
any fix appreciated.
Regards