A month ago version 1.1 was released and a few days ago version 1.1.99 was released, which should probably preferred over the 9999 version in tree right now.
[master e3c318c62822] media-sound/pulseaudio-modules-bt: Bump to v1.3 2 files changed, 73 insertions(+) create mode 100644 media-sound/pulseaudio-modules-bt/Manifest create mode 100644 media-sound/pulseaudio-modules-bt/pulseaudio-modules-bt-1.3.ebuild