Jump to definition in the package source file

For example when I try to use `haskell-mode-jump-to-def-or-tag` on `map` function it only displays

> Defined in `GHC.Base'.

Is it possible to jump to source file instead?

Start at the `haskell-mode-jump-to-def-or-tag` entry point and trace how a definition such as `map` is resolved to `GHC.Base`. Determine how the package source file could be located rather than only displaying the module name, and verify that jumping from the command opens the expected source location.

Written by the indexing model from the issue text.