/bin/sh: -chmod: command not found

What's the better way to deal with this phenomenon? … Making all in api make[4]: Entering directory `/home/poma/rpmbuild/BUILD/ModemManager-1.2.0/docs/reference/api' DOC Preparing build DOC Scanning header files DOC Introspecting gobjects DOC Rebuilding template files DOC Building XML /bin/sh: -chmod: command not found DOC Building HTML DOC Fixing cross-references make[4]: Leaving directory `/home/poma/rpmbuild/BUILD/ModemManager-1.2.0/docs/reference/api' Making all in libmm-glib make[4]: Entering directory `/home/poma/rpmbuild/BUILD/ModemManager-1.2.0/docs/reference/libmm-glib' DOC Preparing build DOC Scanning header files DOC Introspecting gobjects DOC Rebuilding template files DOC Building XML /bin/sh: -chmod: command not found DOC Building HTML DOC Fixing cross-references … Thanks. poma