Unfortunately, neither Ubuntu 20.04 nor 18.04 have a recent enough PipeWire package. Disable the PipeWire bits of linux-capture there. The Flatpak workflow is still able to build it, so keep it enabled there.
Unfortunately, neither Ubuntu 20.04 nor 18.04 have a recent enough PipeWire package. Disable the PipeWire bits of linux-capture there. The Flatpak workflow is still able to build it, so keep it enabled there.