在Golang中的模块中找不到用法

I'm using struct from subpackage and it works. But on find usage of this structure IDEA doesn't see usages. The same situation on rename for the structure - IDEA renames the original structure and doesn't rename it in all places of usage. How can I fix it, because I don't want to put all go files only in one package.

go project directory like this.

projectname:
  bin/
  src/
     structs/
        custom_types.go
     main.go
  pkg/

Use go build command will auto create bin/pkg directory. src directory contains all go source files.