title: How can make my GoLand to detect dependency packages under $GOPATH/pkg/mod?
body: <p>I'm trying through kubebuilder tutorial, and just imported existing project to GoLand.</p>
  
  <p>Workthrough with kubebuilder auto-generated scaffold codes, and auto-downloaded pkgs with go mod for me. I had no problem when I was working with commandline environment, but turns out, after opening the project with GoLand, IDE is failing to resolve imported package names, which means it is failing to detect - or link - packages installed by go mod.</p>
  
  <p>I enabled go mod(with vendoring) and dep both from IDE preferences, set GOPATH and Go runtime properly, but the error keeps to appear.</p>
  
  <p>I don't know why I'm getting this error, and how to solve it.</p>
  
  <p>+) Working Directory is $GOPATH/src/example, all the logics and settings are placed in the directory. Installed dependencies are placed under $GOPATH/pkg/mod.</p>