samples fail to build from source

[fnoop]

[ 21%] Building CXX object samples/or_pt_tutorial_1/CMakeFiles/sample_or_pt_tutorial_1.dir/cpp/main.cpp.o
In file included from /srv/maverick/code/realsense/samples/samples/or_pt_tutorial_1/cpp/main.cpp:8:0:
/srv/maverick/code/realsense/samples/samples/or_pt_tutorial_1/../common/utils/pt_utils.hpp:6:31: fatal error: librealsense/rs.hpp: No such file or directory
compilation terminated.
samples/or_pt_tutorial_1/CMakeFiles/sample_or_pt_tutorial_1.dir/build.make:62: recipe for target 'samples/or_pt_tutorial_1/CMakeFiles/sample_or_pt_tutorial_1.dir/cpp/main.cpp.o' failed
make[2]: *** [samples/or_pt_tutorial_1/CMakeFiles/sample_or_pt_tutorial_1.dir/cpp/main.cpp.o] Error 1
CMakeFiles/Makefile2:345: recipe for target 'samples/or_pt_tutorial_1/CMakeFiles/sample_or_pt_tutorial_1.dir/all' failed
make[1]: *** [samples/or_pt_tutorial_1/CMakeFiles/sample_or_pt_tutorial_1.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2

librealsense is installed into /srv/maverick/software/librealsense, and I have CMAKE_PREFIX_PATH set: CMAKE_PREFIX_PATH=/srv/maverick/software/librealsense/lib/cmake