The easiest way to "install" LÖVEBrew is from the releases page. Download the respective platform's release and put it in the following directory for your operating system:
%appdata%/lovebrew/
~/.config/lovebrew/
usage: lovebrew [-h] [-init] [-build [APP_VERSION]] [--version]
options:
-h, --help show this help message and exit
-init, -i create a new config
-build [APP_VERSION], -b [APP_VERSION]
build a project
--version show program's version number and exit
nimble build
nimble run