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

Calculating dependencies ...

!!! Problem resolving dependencies for =dev-lang/lazarus-3.4-r1
 done!
Dependency resolution took 0.83 s (backtrack: 0/20).


!!! The ebuild selected to satisfy "=dev-lang/lazarus-3.4-r1" has unmet requirements.
- dev-lang/lazarus-3.4-r1::gentoo USE="gui -extras -gtk -gtk2 -qt6"

  The following REQUIRED_USE flag constraints are unsatisfied:
    gui? ( exactly-one-of ( gtk2 gtk qt6 ) )

  The above constraints are a subset of the following complete expression:
    gui? ( exactly-one-of ( gtk2 gtk qt6 ) ) extras? ( gui )