>>> Emerging : portage://games-puzzle/braid-hb-20150611-r1:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ unmask  portage://games-puzzle/braid-hb-20150611-r1

 └─step  2─┤ verify  media-gfx/nvidia-cg-toolkit (unsatisfied constraints, assumed running)
             │ verify  media-libs/libsdl2 (unsatisfied constraints, assumed running)
             │ download  portage://games-puzzle/braid-hb-20150611-r1
             │           └─ file ─┤ 115.99 Mb  	 BraidSetup-2015-06-11.sh

Total: 2 actions (1 unmask, 1 download), grouped into 2 steps.
       115.99 Mb to be downloaded.



>>> Assumptions taken during proving & planning:

  Package unmask (1 package):
  Add to /etc/portage/package.unmask:
    =games-puzzle/braid-hb-20150611-r1


Error The proof for your build plan contains domain assumptions. Please verify:


>>> Domain assumptions

- REQUIRED_USE violation: 
  media-gfx/nvidia-cg-toolkit
  No ebuild satisfies USE deps for portage://media-gfx/nvidia-cg-toolkit-3.1.0013-r6 (use_dep_unsat)
  USE deps force:   [abi_x86_32]
  conflicts with profile use.mask / use.force
  required by: portage://games-puzzle/braid-hb-20150611-r1

- REQUIRED_USE violation: 
  media-libs/libsdl2
  No ebuild satisfies USE deps for portage://media-libs/libsdl2-2.32.10 (use_dep_unsat)
  USE deps force:   [abi_x86_32,joystick,opengl,sound,video]
  conflicts with profile use.mask / use.force
  required by: portage://games-puzzle/braid-hb-20150611-r1


>>> Bug report drafts (Gentoo Bugzilla)

---
Summary: portage://games-puzzle/braid-hb-20150611-r1: unsatisfied_constraints dependency on media-gfx/nvidia-cg-toolkit

Affected package: portage://games-puzzle/braid-hb-20150611-r1
Dependency: media-gfx/nvidia-cg-toolkit
Phases: [run]

Unsatisfiable constraint(s):
  media-gfx/nvidia-cg-toolkit-

Observed:
  portage-ng reports no available candidate satisfies the above constraint(s).
  Available versions in repo set (sample, first 1 of 1): [3.1.0013-r6]

Potential fix (suggestion):
  Review dependency metadata in portage://games-puzzle/braid-hb-20150611-r1; constraint set: [constraint(none,,[])].

---
Summary: portage://games-puzzle/braid-hb-20150611-r1: unsatisfied_constraints dependency on media-libs/libsdl2

Affected package: portage://games-puzzle/braid-hb-20150611-r1
Dependency: media-libs/libsdl2
Phases: [run]

Unsatisfiable constraint(s):
  media-libs/libsdl2-

Observed:
  portage-ng reports no available candidate satisfies the above constraint(s).
  Available versions in repo set (sample, first 8 of 10): [2.30.11,2.30.7-r1,2.32.0,2.32.10,2.32.2,2.32.4,2.32.6,2.32.72]

Potential fix (suggestion):
  Review dependency metadata in portage://games-puzzle/braid-hb-20150611-r1; constraint set: [constraint(none,,[])].