can't find linkage dependency

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Hi,

I am trying to compile my package but I am getting the following error:

/usr/bin/ld: cannot find -lgripper_click_ui
collect2: ld returned 1 exit status

In my manifest I have the following two dependencies which possibly give me the hard time but it should be including the missing library:

<depend package="pr2_gripper_click"/>
<depend package="pr2_pick_and_place_demos"/>

This error occurs when I run make or rosmake. I am using diamondback.

Any clues?

Many thanks.