$ sudo emerge qt5dxcb-plugin::deepin
Calculating dependencies  ..... done!

>>> Verifying ebuild manifests

>>> Emerging (1 of 1) dev-qt/qt5dxcb-plugin-1.1.8::deepin
 * qt5dxcb-plugin-1.1.8.tar.gz SHA256 size ;-) ...                       [ ok ]
>>> Unpacking source...
>>> Unpacking qt5dxcb-plugin-1.1.8.tar.gz to /var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work
>>> Source unpacked in /var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work
>>> Preparing source in /var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work/qt5dxcb-plugin-1.1.8 ...
 * Running qmake ...
Info: creating stash file /var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work/qt5dxcb-plugin-1.1.8/.qmake.stash
 [ ok ]
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work/qt5dxcb-plugin-1.1.8 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work/qt5dxcb-plugin-1.1.8 ...
make -j3 
cd platformplugin/ && ( test -e Makefile.qt5platform-plugin || /usr/lib64/qt5/bin/qmake -o Makefile.qt5platform-plugin /var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work/qt5dxcb-plugin-1.1.8/platformplugin/qt5platform-plugin.pro 'QMAKE_AR=x86_64-pc-linux-gnu-ar cqs' QMAKE_CC=x86_64-pc-linux-gnu-gcc QMAKE_LINK_C=x86_64-pc-linux-gnu-gcc QMAKE_LINK_C_SHLIB=x86_64-pc-linux-gnu-gcc QMAKE_CXX=x86_64-pc-linux-gnu-g++ QMAKE_LINK=x86_64-pc-linux-gnu-g++ QMAKE_LINK_SHLIB=x86_64-pc-linux-gnu-g++ QMAKE_OBJCOPY=x86_64-pc-linux-gnu-objcopy QMAKE_RANLIB= QMAKE_STRIP= 'QMAKE_CFLAGS=-march=native -O2 -pipe' QMAKE_CFLAGS_RELEASE= QMAKE_CFLAGS_DEBUG= 'QMAKE_CXXFLAGS=-O2 -pipe' QMAKE_CXXFLAGS_RELEASE= QMAKE_CXXFLAGS_DEBUG= 'QMAKE_LFLAGS=-Wl,-O1 -Wl,--as-needed' QMAKE_LFLAGS_RELEASE= QMAKE_LFLAGS_DEBUG= ) && make -f Makefile.qt5platform-plugin 
fatal: Not a git repository (or any of the parent directories): .git
Project ERROR: Not support Qt Version: 5.9.4
make: *** [Makefile:45: sub-platformplugin-qt5platform-plugin-pro-make_first] Error 3
 * ERROR: dev-qt/qt5dxcb-plugin-1.1.8::deepin failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=dev-qt/qt5dxcb-plugin-1.1.8::deepin'`,
 * the complete build log and the output of `emerge -pqv '=dev-qt/qt5dxcb-plugin-1.1.8::deepin'`.
 * The complete build log is located at '/var/log/portage/dev-qt:qt5dxcb-plugin-1.1.8:20180416-131744.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work/qt5dxcb-plugin-1.1.8'
 * S: '/var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work/qt5dxcb-plugin-1.1.8'

>>> Failed to emerge dev-qt/qt5dxcb-plugin-1.1.8, Log file:

>>>  '/var/log/portage/dev-qt:qt5dxcb-plugin-1.1.8:20180416-131744.log'
 * Messages for package dev-qt/qt5dxcb-plugin-1.1.8:
 * Log file: /var/log/portage/dev-qt:qt5dxcb-plugin-1.1.8:20180416-131744.log
 * ERROR: dev-qt/qt5dxcb-plugin-1.1.8::deepin failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=dev-qt/qt5dxcb-plugin-1.1.8::deepin'`,
 * the complete build log and the output of `emerge -pqv '=dev-qt/qt5dxcb-plugin-1.1.8::deepin'`.
 * The complete build log is located at '/var/log/portage/dev-qt:qt5dxcb-plugin-1.1.8:20180416-131744.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work/qt5dxcb-plugin-1.1.8'
 * S: '/var/tmp/portage/dev-qt/qt5dxcb-plugin-1.1.8/work/qt5dxcb-plugin-1.1.8'