// On Plan 9, the value is a list.
//
// If the environment variable is unset, GOPATH defaults
// to a subdirectory named "go" in the user's home directory
// ($HOME/go on Unix, %USERPROFILE%\go on Windows),
// unless that directory holds a Go distribution.
// Run "go env GOPATH" to see the current GOPATH.
//
// See https://golang.org/wiki/SettingGOPATH to set a custom GOPATH.
//