Hi,
I don't think this is something I'm supposed to specify manually, but I have to add PYTHON_SINGLE_TARGET="python3_3" in order to get intel-gpu-tools-1.7 to build.

Calculating dependencies \

!!! Problem resolving dependencies for x11-apps/intel-gpu-tools from @selected
... done!

!!! The ebuild selected to satisfy "x11-apps/intel-gpu-tools" has unmet requirements.

• x11-apps/intel-gpu-tools-1.7::gentoo USE="python" PYTHON_SINGLE_TARGET="-python3_3 -python3_4" PYTHON_TARGETS="python3_3 -python3_4" VIDEO_CARDS="-nouveau"

The following REQUIRED_USE flag constraints are unsatisfied:
python? ( exactly-one-of ( python_single_target_python3_3 python_single_target_python3_4 ) )

The above constraints are a subset of the following complete expression:
python? ( exactly-one-of ( python_single_target_python3_3 python_single_target_python3_4 ) python_single_target_python3_3? ( python_targets_python3_3 ) python_single_target_python3_4? ( python_targets_python3_4 ) )

(dependency required by "@selected" [set])
(dependency required by "@world" [argument])