Where is the module cache in golang?

Question

When I enable gomodules and build my go program then the required packages are downloaded.

But I cannot find them in $GOPATH/src/ or in $GOPATH/s

Answer 1

I'm on Macos 10.13.6, using go1.11 darwin/amd64 and echo $GOPATH is empty.

I found my modules in $HOME/go/pkg/mod