FWIW removing the Makefile and simply running "go build" in the directory results in a working build on go version go1.2 darwin/amd64. With the Makefile I had

FWIW removing the Makefile and simply running "go build" in the directory results in a working build on go version go1.2 darwin/amd64. With the Makefile I had to alter the static Go version to "darwin" to get it to pull the correct source.