>>> Emerging : portage://games-rpg/dungeon-defenders-20130305-r1:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ unmask  portage://games-rpg/dungeon-defenders-20130305-r1
             │ useflag portage://app-text/xmlto-0.0.28-r11 (text)

 └─step  2─┤ verify  media-libs/libsdl2 (unsatisfied constraints, assumed running)
             │ verify  media-libs/openal (unsatisfied constraints, assumed running)
             │ download  portage://app-text/xmlto-0.0.28-r11
             │           └─ file ─┤ 124.92 Kb  	 xmlto-0.0.28.tar.bz2
             │ download  portage://games-rpg/dungeon-defenders-20130305-r1
             │           └─ file ─┤ 5.01 Gb  	 dundef-linux-03052013.mojo.run
             │ download  portage://x11-apps/xprop-1.2.8
             │           └─ file ─┤ 143.94 Kb  	 xprop-1.2.8.tar.xz
             │ download  portage://x11-apps/xset-1.2.6
             │           └─ file ─┤ 142.69 Kb  	 xset-1.2.6.tar.xz
             │ download  portage://x11-misc/xdg-utils-1.2.1-r11
             │           └─ file ─┤ 286.51 Kb  	 xdg-utils-v1.2.1.tar.bz2

Total: 7 actions (1 unmask, 1 useflag, 5 downloads), grouped into 2 steps.
       5.02 Gb to be downloaded.



>>> Assumptions taken during proving & planning:

  Package unmask (1 package):
  Add to /etc/portage/package.unmask:
    =games-rpg/dungeon-defenders-20130305-r1

  USE flag change (1 package):
  Add to /etc/portage/package.use:
    app-text/xmlto text


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


>>> Domain assumptions

- 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,opengl,video]
  conflicts with profile use.mask / use.force
  required by: portage://games-rpg/dungeon-defenders-20130305-r1

- REQUIRED_USE violation: 
  media-libs/openal
  No ebuild satisfies USE deps for portage://media-libs/openal-1.25.2 (use_dep_unsat)
  USE deps force:   [abi_x86_32]
  conflicts with profile use.mask / use.force
  required by: portage://games-rpg/dungeon-defenders-20130305-r1


>>> Bug report drafts (Gentoo Bugzilla)

---
Summary: portage://games-rpg/dungeon-defenders-20130305-r1: unsatisfied_constraints dependency on media-libs/libsdl2

Affected package: portage://games-rpg/dungeon-defenders-20130305-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-rpg/dungeon-defenders-20130305-r1; constraint set: [constraint(none,,[])].

---
Summary: portage://games-rpg/dungeon-defenders-20130305-r1: unsatisfied_constraints dependency on media-libs/openal

Affected package: portage://games-rpg/dungeon-defenders-20130305-r1
Dependency: media-libs/openal
Phases: [run]

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

Observed:
  portage-ng reports no available candidate satisfies the above constraint(s).
  Available versions in repo set (sample, first 2 of 2): [1.24.3,1.25.2]

Potential fix (suggestion):
  Review dependency metadata in portage://games-rpg/dungeon-defenders-20130305-r1; constraint set: [constraint(none,,[])].