diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3478950..150cd2c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ set(CMAKE_CXX_STANDARD 11)
 
 project(cppchallenge)
 find_package(CLI11 REQUIRED)
-set(BUILD_DIR "build")
+set(BUILD_DIR "${PROJECT_SOURCE_DIR}/build")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${BUILD_DIR})
 set(CLI11_DIR ${BUILD_DIR})
 file(GLOB SOURCES "src/*.cpp")