On windows, just download it and rename it to s7.exe.
On Linux/macOS, we suggest that you should download the binary to $HOME/bin/s7.
Here are sample command lines to install the S7 binary on macOS arm64:
mkdir -p $HOME/bin
wget https://github.com/XmacsLabs/s7-scheme-binary/releases/download/v20230413.0/s7_macosx_arm64 -O $HOME/bin/s7
chmod +x $HOME/bin/s7
For example, v20230413.0 means we are using the S7 scheme on 2023/04/13. And 0 identifies the packager script version.