These are the packages that would be merged, in order:

Calculating dependencies ...

!!! Problem resolving dependencies for =dev-embedded/urjtag-2021.03
 done!
Dependency resolution took 0.84 s (backtrack: 0/20).


!!! The ebuild selected to satisfy "=dev-embedded/urjtag-2021.03" has unmet requirements.
- dev-embedded/urjtag-2021.03::gentoo USE="python readline (-ftd2xx) -ftdi -usb" PYTHON_TARGETS="-python3_12"

  The following REQUIRED_USE flag constraints are unsatisfied:
    python? ( python_targets_python3_12 )

  The above constraints are a subset of the following complete expression:
    python? ( any-of ( python_targets_python3_12 ) )