Build from Source
Building from source gives you the latest version and allows you to customize the build:
git clone https://github.com/haruki7049/kakei.git
cd kakei
cargo build --release
The binary will be available at target/release/kakei. You can copy it to a directory on your PATH (e.g., /usr/local/bin) if desired:
sudo cp target/release/kakei /usr/local/bin/