go install报错
➜ pkgtool pwd /home/zhoujun/workspace/my_go_learn/goc2p/src/pkgtool ➜ pkgtool go env GOARCH="amd64" GOBIN="" GOCHAR="6" GOEXE="" GOHOSTARCH="amd64" GOHOSTOS="linux" GOOS="linux" GOPATH="/home/zhoujun/workspace/my_go_learn" GORACE="" GOROOT="/usr/lib/go" GOTOOLDIR="/usr/lib/go/pkg/tool/linux_amd64" CC="gcc" GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0" CXX="g++" CGO_ENABLED="1" ➜ pkgtool go install go install: no install location for directory /home/zhoujun/workspace/my_go_learn/goc2p/src/pkgtool outside GOPATH ➜ pkgtool
这个要怎么解决