gmapping [SKIP] No rule to make target None

edit

I'm am trying to build gmapping from source and for some reason it's not building the executables....

In a rosbuild workspace I used:

rosws set slam_gmapping --git git@github.com:dawonn/slam_gmapping.git
rosws update gmapping
source ./setup.bash
roscd gmapping
rosmake

[rosmake-0] Starting >>> gmapping [ make ]
[rosmake-0] Finished <<< gmapping [SKIP] No rule to make target None

$ rosrun gmapping slam_gmapping

[rosrun] Couldn't find executable named slam_gmapping below /home/dereck/rosbuild_ws/slam_gmapping/gmapping

rosrun gmapping < tab > < tab >

libconfigfile.so liblog.so libsensor_base.so libsensor_range.so test_map.py
libgridfastslam.so libscanmatcher.so libsensor_odometry.so libutils.so

Any idea what I'm doing wrong here?

Thanks!