Acton tip releases are like nightlies but more up to date.
Install Acton tip releases via this apt repository:
sudo install -m 0755 -d /etc/apt/keyrings
sudo wget -q -O /etc/apt/keyrings/acton.asc https://aptip.acton-lang.io/acton.gpg
sudo chmod a+r /etc/apt/keyrings/acton.asc
echo "deb [signed-by=/etc/apt/keyrings/acton.asc] http://aptip.acton-lang.io/ tip main" | sudo tee /etc/apt/sources.list.d/acton.list
sudo apt-get update
sudo apt-get install -qy acton