diff --git a/cmake/configure_compiler.cmake b/cmake/configure_compiler.cmake
index 33d3957..5181b58 100644
--- a/cmake/configure_compiler.cmake
+++ b/cmake/configure_compiler.cmake
@@ -22,11 +22,11 @@
 # Select the compiler specific cmake file
 set(MSVC_ID "MSVC")
 if (${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang")
-  include(${CMAKE_SOURCE_DIR}/cmake/compiler/clang.cmake)
+  include(${PROJECT_SOURCE_DIR}/cmake/compiler/clang.cmake)
 elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
-  include(${CMAKE_SOURCE_DIR}/cmake/compiler/gcc.cmake)
+  include(${PROJECT_SOURCE_DIR}/cmake/compiler/gcc.cmake)
 elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL ${MSVC_ID})
-  include(${CMAKE_SOURCE_DIR}/cmake/compiler/msvc.cmake)
+  include(${PROJECT_SOURCE_DIR}/cmake/compiler/msvc.cmake)
 else()
   message(FATAL_ERROR "Unknown compiler!")
 endif()
diff --git a/cmake/configure_macros.cmake b/cmake/configure_macros.cmake
index 91b6bac..7a19aaa 100644
--- a/cmake/configure_macros.cmake
+++ b/cmake/configure_macros.cmake
@@ -19,4 +19,4 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-include(${CMAKE_SOURCE_DIR}/cmake/macros/group_sources.cmake)
+include(${PROJECT_SOURCE_DIR}/cmake/macros/group_sources.cmake)