Building apr-util-1.6.1 within httpd on Windows: expat xml.mak missing

I'm trying to build 64-bit httpd-2.4.29 on Windows with apr-util-1.6.1 and Visual Studio 2015 via command line nmake and I'm running into a problem with the expat unbundling from apr-util. Building with apr-util-1.5.4 works fine, but would prefer to not build with an older apr and apr-util. I d

RE: Building apr-util-1.6.1 within httpd on Windows: expat xml.mak missing

Follow up: I was able to get a successful build. After inspecting the various makefiles, I discovered that the default setting for XML_PARSER was not actually being set if it was not speciried in the nmake command line. The comments within Makefile.win implied that "libexpat" was the default