curl -fsSL https://debian.theorganist24.co.uk/theorganist24-archive-keyring.asc \
    | sudo gpg --dearmor -o /usr/share/keyrings/theorganist24-archive-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/theorganist24-archive-keyring.gpg] \
    https://debian.theorganist24.co.uk trixie main" \
    | sudo tee /etc/apt/sources.list.d/theorganist24.list

sudo apt update