1.

go get -u github.com/go-delve/delve/cmd/dlv

(或参考
git clone https://github.com/go-delve/delve.git $GOPATH/src/github.com/go-delve/delve
cd $GOPATH
go install github.com/go-delve/delve/cmd/dlv
)

2.

修改Goland的配置,Help->Edit Custom Properties编辑配置文件,增加dlv的路径配置,文件键入以下内容:

dlv.path=/你的GOPATH路径/bin/dlv