C++17 no longer available

Our development team has been using NetBeans for C++ development on Linux, using this guide:
https://stackoverflow.com/a/59835093
to enable C++17 support. If I understand correctly, the plugin portal this guide recommends
http://bits.netbeans.org/dev/nbms-and-javadoc/lastSuccessfulBuild/artifact/nbbuild/nbms/updates.xml.gz
used to be a nightly channel for the full-featured version of the C++ plugin, and has now been decommissioned.
 
Unfortunately this means that updating to NetBeans 12.3 has “updated” our installed plugins back to the stable version that does not have C++17 support, and so when opening the projects, not only the editor does not understand our code, but even in the NetBeans-generated makefiles, the compiler flag that sets the language standard automatically gets removed.
  
Is there a way to install the latest nightly version of this plugin with 12.3 and have it working as well as it was in 12.2? Any workaround will do because this is currently blocking my work.