A prebuilt install script is on its way. Until it ships, build the compiler from source — it's a single Go module.
$ git clone https://github.com/eraymerc/hover-lang.git
$ cd hover-lang
$ make build
Requires Go and a C++17 toolchain (the runtime links against the bundled Eigen headers). See the repository README for target-specific flags.
Prebuilt binaries for Linux, macOS and Windows, plus the one-line install script, ship with the next release.