Quais devem ser os valores de GOPATH e GOROOT?

Estou tentando instalar o doozer assim: $ goinstall github.com/ha/doozer Eu recebo esses erros. goinstall: os: go/build: package could not be found locally goinstall: fmt: go/build: package could not be found locally goinstall: io: go/build: package could not be found locally goinstall:...