Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
+ rm -f /builddir/build/BUILD/freecad-1.1.0_dev-build/BUILDROOT/usr/lib64/freecad/include/E57Format/E57Export.h
+ rm -f /builddir/build/BUILD/freecad-1.1.0_dev-build/BUILDROOT/usr/include/gmock
rm: cannot remove '/builddir/build/BUILD/freecad-1.1.0_dev-build/BUILDROOT/usr/include/gmock': Is a directory
Shows the error