$ cat /var/tmp/portage/games-engines/openxcom-9999/temp/build.log
 * Package:    games-engines/openxcom-9999
 * Repository: gentoo
 * Maintainer: games@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux userland_GNU
 * FEATURES:   preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
 * Fetching https://github.com/SupSuper/OpenXcom.git ...
git fetch https://github.com/SupSuper/OpenXcom.git +HEAD:refs/git-r3/HEAD
git symbolic-ref refs/git-r3/games-engines/openxcom/0/__main__ refs/git-r3/HEAD
 * Checking out https://github.com/SupSuper/OpenXcom.git to /var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999 ...
git checkout --quiet refs/git-r3/HEAD
GIT update -->
   repository:               https://github.com/SupSuper/OpenXcom.git
   at the commit:            689417f47ff1a03632caa069966b86e14f0c68ad
>>> Source unpacked in /var/tmp/portage/games-engines/openxcom-9999/work
>>> Preparing source in /var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999 ...
>>> Working in BUILD_DIR: "/var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999_build"
cmake -C /var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999_build/gentoo_common_config.cmake -G Unix Makefiles -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Gentoo -DCMAKE_USER_MAKE_RULES_OVERRIDE=/var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999_build/gentoo_rules.cmake -DCMAKE_TOOLCHAIN_FILE=/var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999_build/gentoo_toolchain.cmake  /var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999
loading initial cache file /var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999_build/gentoo_common_config.cmake
CMake Error at CMakeLists.txt:168:
  Parse error.  Expected "(", got quoted argument with text
  "${CMAKE_INSTALL_FULL_DATAROOTDIR}/applications".


-- Configuring incomplete, errors occurred!
 * ERROR: games-engines/openxcom-9999::gentoo failed (configure phase):
 *   cmake failed
 *
 * Call stack:
 *     ebuild.sh, line  115:  Called src_configure
 *   environment, line 3887:  Called cmake-utils_src_configure
 *   environment, line 1125:  Called die
 * The specific snippet of code:
 *       "${CMAKE_BINARY}" "${cmakeargs[@]}" "${CMAKE_USE_DIR}" || die "cmake failed";
 *
 * If you need support, post the output of `emerge --info '=games-engines/openxcom-9999::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=games-engines/openxcom-9999::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/games-engines/openxcom-9999/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/games-engines/openxcom-9999/temp/environment'.
 * Working directory: '/var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999_build'
 * S: '/var/tmp/portage/games-engines/openxcom-9999/work/openxcom-9999'