cannot build release 1.42 on RPiOS

In the past,I have successfully built connman versions 1.38-41 from
source on numerous RPi based systems runnign arch and rpios. I tried
to build the latest, 1.42, and cannot get past this error:

scripts/libppp-plugin.c:37:10: fatal error: libppp-compat.h: No such
file or directory
   37 | #include "libppp-compat.h"
      |          ^~~~~~~~~~~~~~~~~
compilation terminated.

A search for a debian package with this file reveals nothing. What am
I missing here?

I have used this 'config' for a while w/o issue (I borrowed it from Arch Linux):

  ./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var \
      --runstatedir='/run' \
      --enable-iwd \
      --enable-l2tp \
      --enable-openconnect \
      --enable-openvpn \
      --enable-pie \
      --enable-polkit \
      --enable-pptp \
      --enable-selinux \
      --enable-threads \
      --with-openconnect=/usr/sbin/openconnect \
      --with-openvpn=/usr/sbin/openvpn \
      --with-systemdunitdir=/lib/systemd/system \
      --with-tmpfilesdir=/usr/lib/tmpfiles.d

Any help appreciated.

Keith