Tvheadend

Hello thought i would test Bookworm on a Raspberry Pi4 and build TVheadend from master but when i use ./Autobuild.sh i get a error saying target bookworm-aarch64 not supported so wondered is there a work around ?

pi@test:~/build/tvheadend/master $ ./Autobuild.sh
OS identified using lsb_release command
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean
target bookworm-aarch64 not supported