diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
index ca9c6747..a86c393f 100644
--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -12,8 +12,8 @@ endif()
 
 # Boost
 if (NOT TARGET Boost::headers)
-    set(BOOST_ROOT "${CMAKE_SOURCE_DIR}/externals/boost" CACHE STRING "")
-    set(Boost_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/externals/boost" CACHE STRING "")
+    set(BOOST_ROOT "${CMAKE_SOURCE_DIR}/externals/ext-boost" CACHE STRING "")
+    set(Boost_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/externals/ext-boost" CACHE STRING "")
     set(Boost_NO_SYSTEM_PATHS ON CACHE BOOL "")
     add_library(boost INTERFACE)
     target_include_directories(boost SYSTEM INTERFACE ${Boost_INCLUDE_DIR})