go build报错cannot find package

##### **go env 关键数据是这样的 ** ###### **GOPATH="/home/zzy/goProject"** ###### **GOROOT="/usr/local/go"** ###### 项目目录是这样的 ``` goProject ├── bin ├── pkg └── src └── go_learn └── day01 ├── hello │   ├── hello │   └── hello.go └── str_type ├── str.go └── world.go ``` ##### hello.go我的代码是这样的 ``` package main import ( "fmt" "go_learn/day01/str_type/world" ## 这句导入包，一直报错 ) func main() { fmt.Print("hello world") test() } ``` ##### world.go代码是这样的 ``` package main import "fmt" func test() { fmt.Print("啦啦啦啦") } ``` ###### go build 报错是这样的 ``` $ go build hello.go:5:2: cannot find package "go_learn/day01/str_type/world" in any of: /usr/local/go/src/go_learn/day01/str_type/world (from $GOROOT) /home/zzy/goProject/src/go_learn/day01/str_type/world (from $GOPATH) ``` ##### 我自己查路径，是有world 包的 ##### 求 大神解释，感觉是很简单的问题啊，自己太菜了