Me too not have luck with the last SVN
make.exe[1]: Entering directory 'C:/msys64/src/qmc2'
make.exe -f Makefile.qmake.Release
make.exe[2]: Entering directory 'C:/msys64/src/qmc2'
/C/msys64/mingw64/bin/uic.exe qmc2main.ui -o ui_qmc2main.h
process_begin: CreateProcess(NULL, sh.yyy -c "/C/msys64/mingw64/bin/uic.exe qmc2main.ui -o ui_qmc2main.h", ...) failed.
make (e=2): The system cannot find the file specified.
Makefile.qmake.Release:13717: recipe for target 'ui_qmc2main.h' failed
make.exe[2]: *** [ui_qmc2main.h] Error 2
make.exe[2]: Leaving directory 'C:/msys64/src/qmc2'
Makefile.qmake:45: recipe for target 'release' failed
make.exe[1]: *** [release] Error 2
make.exe[1]: Leaving directory 'C:/msys64/src/qmc2'
makefile:1042: recipe for target 'qmc2-bin' failed
make.exe: *** [qmc2-bin] Error 2
make.exe: Leaving directory 'C:/msys64/src/qmc2'

Hope somebody fix this