Downstream bug report: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=862877

The libnm-glib/libnm-util libraries have been deprecated upstream in
favour of libnm.


Afaics, this is used in cmake/modules/FindNetworkManager.cmake to
decide whether to enable NetworkManager support or not and
src/solid-networkstatus/kded/networkmanagerstatus.cpp includes
NetworkManager.h for a couple of defines and the version check macro.

Please consider porting this over to libnm.
libnm provides an API similar to libnm-glib/libnm-util [1].

Since libnm-dev also provides NetworkManager.h, you probably just need
to change cmake/modules/FindNetworkManager.cmake to look for libnm
instead of NetworkManager (or libnm-util) so the include path is
properly set and changing the Build-Depends on network-manager-dev to
libnm-dev.

Since libnm was introduced in network-manager 1.0, you can also drop the
explicit version checks in networkmanagerstatus.cpp via
NM_CHECK_VERSION(0,8,992).

Regards,
Michael

[1] https://developer.gnome.org/libnm/stable/