Fix CMakeLists

Author: lolpie244

CMakeLists.txt

@@ -50,15 +50,9 @@ install(EXPORT alpacaConfig
         NAMESPACE alpaca::
         DESTINATION ${CMAKE_INSTALL_LIBDIR_ARCHIND}/cmake/${PROJECT_NAME})
 
-install(FILES ${CMAKE_CURRENT_LIST_DIR}/include/alpaca/alpaca.h
-        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/alpaca)
+install(DIRECTORY ${CMAKE_CURRENT_LIST_DIR}/include/alpaca
+        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
-FILE(GLOB ALPACA_HEADERS 
-    "${PROJECT_SOURCE_DIR}/include/alpaca/detail/*.h"
-    )
-
-install(FILES ${ALPACA_HEADERS}
-        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/alpaca/detail)
 
 set(CONFIG_FILE_NAME_WITHOUT_EXT "${PROJECT_NAME}Config")
 set(CMAKE_CONFIG_FILE_BASENAME "${CMAKE_CURRENT_BINARY_DIR}/${CONFIG_FILE_NAME_WITHOUT_EXT}")