[PD] Ubuntu Xenial repo not found

[enrike]

hi

I am running Ubuntu Xenial with Pd 0.46.7 and I wanted to check if there 
was an update but it seems like the Xenial repo is not available any longer.

$ sudo aptitude update

Ign http://apt.puredata.info/releases xenial InRelease 

Ign http://apt.puredata.info/releases xenial Release
Err http://apt.puredata.info/releases xenial/main amd64 Packages
   404  Not Found
Ign http://apt.puredata.info/releases xenial/main i386 Packages
Ign http://apt.puredata.info/releases xenial/main all Packages
Ign http://apt.puredata.info/releases xenial/main Translation-eu_ES
Ign http://apt.puredata.info/releases xenial/main Translation-eu
Ign http://apt.puredata.info/releases xenial/main Translation-en
Ign http://apt.puredata.info/releases xenial/main amd64 DEP-11 Metadata
Ign http://apt.puredata.info/releases xenial/main DEP-11 64x64 Icons
W: The repository 'http://apt.puredata.info/releases xenial Release' 
does not have a Release file.

is this install method not working and PD needs to be compile from source?
https://puredata.info/docs/faq/debian

thanks!

enrike