Musescore 1.2 make install fails in translations

I get the following error during make install, and the installation (as you might expect) ends. Am I missing something? I'm using Slackware 13.37, x86, and am not aware of any missing dependencies.

-- Up-to-date: /tmp/SBo/package-mscore/usr/share/mscore-1.2/plugins/musescore.com/musescore.com.js
-- Up-to-date: /tmp/SBo/package-mscore/usr/share/mscore-1.2/plugins/musescore.com/README.txt
-- Up-to-date: /tmp/SBo/package-mscore/usr/share/mscore-1.2/plugins/musescore.com/ui/authorize_dialog.ui
-- Up-to-date: /tmp/SBo/package-mscore/usr/share/mscore-1.2/plugins/musescore.com/ui/musescore_dialog.ui
-- Up-to-date: /tmp/SBo/package-mscore/usr/share/mscore-1.2/plugins/musescore.com/ui/musescore_progress.ui
-- Up-to-date: /tmp/SBo/package-mscore/usr/share/mscore-1.2/plugins/musescore.com/ui/start_browser_dialog.ui
-- Up-to-date: /tmp/SBo/package-mscore/usr/share/mscore-1.2/plugins/musescore.com/icons/filesaveonline.svg
CMake Error at share/plugins/musescore.com/translations/cmake_install.cmake:36 (FILE):
file INSTALL cannot find
"/tmp/SBo/mscore-1.2/mscore/share/plugins/musescore.com/translations/locale_de.qm".
Call Stack (most recent call first):
share/plugins/musescore.com/cmake_install.cmake:46 (INCLUDE)
share/plugins/cmake_install.cmake:50 (INCLUDE)
share/cmake_install.cmake:40 (INCLUDE)
cmake_install.cmake:47 (INCLUDE)

make: *** [install] Error 1