Replaced CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR with PROJECT_SOURCE_DIR and PROJECT_BINARY_DIR respectively.
CMAKE_SOURCE_DIR will not point to the source directory of stlab if it's integrated as a subproject in a different repository which makes the paths invalid
Replaced CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR with PROJECT_SOURCE_DIR and PROJECT_BINARY_DIR respectively. CMAKE_SOURCE_DIR will not point to the source directory of stlab if it's integrated as a subproject in a different repository which makes the paths invalid