pmerge -uD -s installed fails every time

[bonsaikitten]

# pmerge -auD -s installed
 * Resolving...
!!! resolution failed
!!! request sys-kernel/gentoo-sources:2.6.23-r5, mode none
!!! trying sys-kernel/gentoo-sources-2.6.23-r5
!!!  failed due to failed inserting provider: virtual/linux-sources-2.6.23-r5 due to conflict [<virtual_ebuild cpvstr=virtual/linux-sources-2.6.23-r1 @0x49686e0>]

Failures encountered:
!!! failed 'sys-kernel/gentoo-sources:2.6.23-r5'
potentials:
No matches found in [<pkgcore.ebuild.profiles.AliasedVirtuals object at 0xc93ed0>, <filterTree raw_repo=<pkgcore.ebuild.repository.ConfiguredTree raw_repo=<ebuild UnconfiguredTree location='/usr/portage' @0xa24e90> wrapped=['provides', 'license', 'fetchables', 'post_rdepends', 'depends', 'rdepends', 'src_uri'] @0xc88390> restriction=<AndRestriction negate=False type='package' finalized=False restrictions=[<OrRestriction negate=False type='package' finalized=False restrictions=[<pkgcore.restrictions.delegated.delegate object at 0x842bd8>, <pkgcore.restrictions.delegated.delegate object at 0xc48a28>] @0x807eb0>, <PackageRestriction attr='keywords' restriction=<ContainmentMatch ('~amd64', 'amd64') all=False @0xc306d8> @0xbeec80>] @0xbee2d0> sentinel=True @0xc886d0>, <filterTree raw_repo=<pkgcore.binpkg.repository.ConfiguredBinpkgTree object at 0xc88750> restriction=<AndRestriction negate=False type='package' finalized=False restrictions=[<OrRestriction negate=False type='package' finalized=False restrictions=[<pkgcore.restrictions.delegated.delegate object at 0x842bd8>, <pkgcore.restrictions.delegated.delegate object at 0xc48a28>] @0x807eb0>, <PackageRestriction attr='keywords' restriction=<ContainmentMatch ('~amd64', 'amd64') all=False @0xc306d8> @0xbeec80>] @0xbee2d0> sentinel=True @0xc887d0>]

[bonsaikitten]

with debug output, hope that's enough:

processing sys-kernel/gentoo-sources:2.6.23-r1 [sys-kernel/gentoo-sources:2.6.23-r1]; mode none choose for sys-kernel/gentoo-sources:2.6.23-r1, built ebuild: sys-kernel/gentoo-sources-2.6.23-r1 rdepends: sys-kernel/gentoo-sources:2.6.23-r1: started: built ebuild: sys-kernel/gentoo-sources-2.6.23-r1 pre-solved >=sys-libs/ncurses-5.2 for >=sys-libs/ncurses-5.2 pre-solved sys-devel/make for sys-devel/make pre-solved virtual/dev-manager for virtual/dev-manager prdepends: sys-kernel/gentoo-sources:2.6.23-r1: started: built ebuild: sys-kernel/gentoo-sources-2.6.23-r1 choice for sys-kernel/gentoo-sources:2.6.23-r1, built ebuild: sys-kernel/gentoo-sources-2.6.23-r1 succeeded processing sys-kernel/gentoo-sources:2.6.23-r5 [sys-kernel/gentoo-sources:2.6.23-r5]; mode none choose for sys-kernel/gentoo-sources:2.6.23-r5, built ebuild: sys-kernel/gentoo-sources-2.6.23-r5 rdepends: sys-kernel/gentoo-sources:2.6.23-r5: started: built ebuild: sys-kernel/gentoo-sources-2.6.23-r5 pre-solved >=sys-libs/ncurses-5.2 for >=sys-libs/ncurses-5.2 pre-solved sys-devel/make for sys-devel/make pre-solved virtual/dev-manager for virtual/dev-manager choice for sys-kernel/gentoo-sources:2.6.23-r5, built ebuild: sys-kernel/gentoo-sources-2.6.23-r5 failed: failed inserting provider: virtual/linux-sources-2.6.23-r5 due to conflict [<virtual_ebuild cpvstr=virtual/linux-sources-2.6.23-r1 @0x49086e0>] no solution sys-kernel/gentoo-sources:2.6.23-r5 failed- [<atom sys-kernel/gentoo-sources slot=('2.6.23-r5',) @#e12ad0>] !!! resolution failed !!! request sys-kernel/gentoo-sources:2.6.23-r5, mode none !!! trying sys-kernel/gentoo-sources-2.6.23-r5 !!! failed due to failed inserting provider: virtual/linux-sources-2.6.23-r5 due to conflict [<virtual_ebuild cpvstr=virtual/linux-sources-2.6.23-r1 @0x49086e0>] !!! ran out of choices

Failures encountered: !!! failed 'sys-kernel/gentoo-sources:2.6.23-r5' potentials: No matches found in [<pkgcore.ebuild.profiles.AliasedVirtuals? object at 0xc93ed0>, <filterTree raw_repo=<pkgcore.ebuild.repository.ConfiguredTree? raw_repo=<ebuild UnconfiguredTree? location='/usr/portage' @0xa24e90> wrapped=['provides', 'license', 'fetchables', 'post_rdepends', 'depends', 'rdepends', 'src_uri'] @0xc88390> restriction=<AndRestriction? negate=False type='package' finalized=False restrictions=[<OrRestriction? negate=False type='package' finalized=False restrictions=[<pkgcore.restrictions.delegated.delegate object at 0x842bd8>, <pkgcore.restrictions.delegated.delegate object at 0xc48a28>] @0x807eb0>, <PackageRestriction? attr='keywords' restriction=<ContainmentMatch? ('~amd64', 'amd64') all=False @0xc306d8> @0xbeec80>] @0xbee2d0> sentinel=True @0xc886d0>, <filterTree raw_repo=<pkgcore.binpkg.repository.ConfiguredBinpkgTree? object at 0xc88750> restriction=<AndRestriction? negate=False type='package' finalized=False restrictions=[<OrRestriction? negate=False type='package' finalized=False restrictions=[<pkgcore.restrictions.delegated.delegate object at 0x842bd8>, <pkgcore.restrictions.delegated.delegate object at 0xc48a28>] @0x807eb0>, <PackageRestriction? attr='keywords' restriction=<ContainmentMatch? ('~amd64', 'amd64') all=False @0xc306d8> @0xbeec80>] @0xbee2d0> sentinel=True @0xc887d0>]