[Csnd] installing with fltk opcodes

Dear community,
I’ve successfully installed csound as it is described there:
https://github.com/csound/csound/blob/develop/BUILD.md
Unfortunately the software comes without the fltk opcodes which I urgently need.
I’ve tried it with

sudo apt install libfltk1.1-dev

before building csound, but with no success.
What can I do now?
Thanks,
Stefan

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

The fltk widgets have been moved out of the main Csound repo. They can be found here:
https://github.com/csound/plugins

Dear Rory,
I’ve installed version 6.17 for now, the fltk opcodes are included.
Thanks,
Stefan