deb http://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-15 main
deb http://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-16 main
deb http://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-17 main
deb http://apt.llvm.org/bookworm/ llvm-toolchain-bookworm-18 main