XFCE Build Error xdt-csource.1

I'm trying to build xfce4-dev-tools on macOS Monetary. to build and install xfce4 desktop environment. im a total noob when it comes to building c/c++ programs. Following the steps - 1. cloned the repo, 2. added the dependencies noted by xfce.org 3. added them to the path. 4. ran ./autogen.sh as mentioned (no error) 5. ran make

bash-3.2$ make
Making all in docs
xsltproc --nonet http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl  xdt-csource.xml
I/O error : Attempt to load network entity http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl 
warning: failed to load external entity "http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl "
cannot parse http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl 
make: *** [xdt-csource.1] Error 4
make: *** [all-recursive] Error 1

what I found out was that linux-doctools is missing and I'm quite lost on an alternative to this lib. also don’t ask me why I'm trying to install a DE on macOS. this should be possible as XFCE should work on nix platforms.