/usr/include/projects/ is in libsofa1-dev 1.0~beta4-6.
This file is owned by root:root, with mode 0o755.
..
/usr/include/projects/DynamicLibExample/
/usr/include/projects/DynamicLibExample/MyFakeComponent.h
/usr/include/projects/DynamicLibExample/OtherFakeComponent.h
/usr/include/projects/DynamicLibExample/OtherFakeComponent.inl
/usr/include/projects/GenerateRigid/
/usr/include/projects/GenerateRigid/GenerateRigid.h
/usr/include/projects/Haptic/
/usr/include/projects/Haptic/lib/
/usr/include/projects/Haptic/lib/ChaiDevice.h
/usr/include/projects/Haptic/lib/HapticMapping.h
/usr/include/projects/Haptic/lib/HapticMapping.inl
/usr/include/projects/Modeler/
/usr/include/projects/Modeler/lib/
/usr/include/projects/Modeler/lib/AddPreset.h
/usr/include/projects/Modeler/lib/DialogAddPreset.h
/usr/include/projects/Modeler/lib/GraphModeler.h
/usr/include/projects/Modeler/lib/Modeler.h
/usr/include/projects/Modeler/lib/PluginManager.h
/usr/include/projects/Modeler/lib/SofaModeler.h
/usr/include/projects/SensAble/
/usr/include/projects/SensAble/SensAble.h
/usr/include/projects/SensAble/argumentParser.h
/usr/include/projects/generateDoc/
/usr/include/projects/generateDoc/generateDoc.h