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Bug 620364 - can't resolve deps for dev-libs/gobject-introspection-0.9.5 because PYTHON_SINGLE_TARGET isn't set
Summary: can't resolve deps for dev-libs/gobject-introspection-0.9.5 because PYTHON_SI...
Status: RESOLVED INVALID
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Linux bug wranglers
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Reported: 2017-06-01 23:37 UTC by Will Reinhart
Modified: 2017-06-01 23:52 UTC (History)
1 user (show)

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Description Will Reinhart 2017-06-01 23:37:15 UTC 
After emerge --sync, emerge -uavDN @world fails with this error: 

!!! The ebuild selected to satisfy ">=dev-libs/gobject-introspection-0.9.5:=" has unmet requirements.
- dev-libs/gobject-introspection-1.50.0::pg_overlay USE="cairo -doctool -test" ABI_X86="64" PYTHON_SINGLE_TARGET="-python2_7 -python3_5 -python3_6" PYTHON_TARGETS="python2_7 -python3_5 -python3_6"

  The following REQUIRED_USE flag constraints are unsatisfied:
    exactly-one-of ( python_single_target_python2_7 python_single_target_python3_5 python_single_target_python3_6 )

  The above constraints are a subset of the following complete expression:
    exactly-one-of ( python_single_target_python2_7 python_single_target_python3_5 python_single_target_python3_6 ) python_single_target_python2_7? ( python_targets_python2_7 ) python_single_target_python3_5? ( python_targets_python3_5 ) python_single_target_python3_6? ( python_targets_python3_6 ) test? ( cairo )

(dependency required by "x11-libs/pango-1.40.5::gentoo[introspection]" [installed])
(dependency required by "dev-qt/qtgui-5.6.2::gentoo[gtkstyle]" [installed])
(dependency required by "media-video/mkvtoolnix-9.6.0::gentoo[qt5]" [installed])
(dependency required by "@selected" [set])
(dependency required by "@world" [argument])

This sounds like it's related to bug 612870.
Comment 1 Mart Raudsepp gentoo-dev 2017-06-01 23:52:48 UTC 
gobject-introspection has PYTHON_COMPAT=( python{2_7,3_4,3_5} ), with 3_4 being the default PYTHON_SINGLE_TARGET now.
Your pg_overlay thing doesn't even have 3_4, so it's not a Gentoo main tree issue.