BuildRosOnRos "ninja bootcd -j1" failed at step 5/9341 during compiling host-tools when building libdbghelphost.a with MessageBox ERROR_PATH_NOT_FOUND

VBox 4.3.40 with 1000MB RAM, no additions

Here is my story when trying to build ros r76032 (last SVN) on ros 0.4.7RC1-11-g850c1d6 gcc:

installing ROSBE 2.1.5 went fine (I selected to install the certs)
starting ROSBE 2.1.5 went fine
'SSVN create' failed although I selected certs -> tracked already in ROSBE-120
I worked around by using 'svn checkout svn://svn.reactos.org/reactos/trunk/reactos'
I restarted (to free some memory) and to workaround CORE-13684
'configure' succeeded after 37min configure_ok.png
I restarted (to free some memory
"ninja bootcd -j1" failed during the step 5/9341 when building libdbghelphost.a with MessageBox ERROR_PATH_NOT_FOUND 047RC1-11_ninjaBootcd._failed.png

When the messagebox was shown, the logfile noted

(../dll/win32/kernel32/client/proc.c:2928) Open file failed: c000003a (\??\C:\ros\reactos\output-MinGW-i386\host-tools\bghelphost.dir\type.c.obj dll\win32\dbghelp\CMakeFiles\dbghelphost.dir\cpu_i386.c.obj)

047RC1-11-fullLog.log
ninja_BootCd_j1.webm