Leksah, go to definition in current package and names defined in packages installed in Sandbox

I am using Leksah 0.15.0.1 built with ghc 7.10.1.

Here's the problem:

If I ctrl + click on the function name which is from the installed library installed on the system, then Leksah goes to the definition, just fine!

However , this (go to definition) does not work for

1) functions defined in the currently edited package

2) defined in packages located in the sandbox.

For example, in the picture below, I can go to the definition SDL.QuitEvent

, but not to the definition AppInput

.

Which is weird because it AppInput

is defined in the same file that I am editing and it SDL.QuitEvent

is defined in the system-installed cabal package.

Any idea how to fix this? What could be wrong? "