root@734a148bfed0:/home/buildg/out# ./buildg debug 
context needs to be specified
main.parseSolveOpt
        /home/buildg/main.go:394
main.debugAction
        /home/buildg/main.go:240
github.com/urfave/cli.HandleAction
        /go/pkg/mod/github.com/urfave/[email protected]/app.go:524
github.com/urfave/cli.Command.Run
        /go/pkg/mod/github.com/urfave/[email protected]/command.go:173
github.com/urfave/cli.(*App).Run
        /go/pkg/mod/github.com/urfave/[email protected]/app.go:277
main.main
        /home/buildg/main.go:70
runtime.main
        /usr/local/go/src/runtime/proc.go:255
runtime.goexit
        /usr/local/go/src/runtime/asm_amd64.s:1581