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

Calculating dependencies ...

!!! Problem resolving dependencies for =app-misc/ola-0.10.9-r2
 done!
Dependency resolution took 0.84 s (backtrack: 0/20).


!!! The ebuild selected to satisfy "=app-misc/ola-0.10.9-r2" has unmet requirements.
- app-misc/ola-0.10.9-r2::gentoo USE="http python zeroconf -doc -examples -ftdi -osc -rdm-tests -tcmalloc -test -usb" PYTHON_SINGLE_TARGET="-python3_12 -python3_13"

  The following REQUIRED_USE flag constraints are unsatisfied:
    python? ( exactly-one-of ( python_single_target_python3_12 python_single_target_python3_13 ) )

  The above constraints are a subset of the following complete expression:
    python? ( exactly-one-of ( python_single_target_python3_12 python_single_target_python3_13 ) ) rdm-tests? ( python )