Currently CUE can only be installed from source.
Go 1.14 or higher (see below)
To download and install the cue command line tool run
go install cuelang.org/go/cmd/cue@latest
If the command fails, make sure your version of Go is 1.16 or later.
And make sure the install directory is in your path.
To also download the API and documentation, run
go get cuelang.org/go/cue@latest
in a module context.
You can install binaries for Windows, MacOS X, and Linux at https://golang.org/dl/. If you use a different OS you can install Go from source.
Follow the instructions at https://golang.org/doc/install#install.
Make sure the go binary is in your path.
CUE uses Go modules, so there is no need to set up a GOPATH.