go怎么全局安装非二进制包？

我用 go get，它提醒我用 go install。我用了 go install，它提醒我只能装二进制包。 ```bash $ go get github.com/gorilla/mux go: go.mod file not found in current directory or any parent directory. 'go get' is no longer supported outside a module. To build and install a command, use 'go install' with a version, like 'go install example.com/cmd@latest' For more information, see https://golang.org/doc/go-get-install-deprecation or run 'go help get' or 'go help install'. $ go get github.com/gorilla/mux@latest go: go.mod file not found in current directory or any parent directory. 'go get' is no longer supported outside a module. To build and install a command, use 'go install' with a version, like 'go install example.com/cmd@latest' For more information, see https://golang.org/doc/go-get-install-deprecation or run 'go help get' or 'go help install'. ```