diff --git a/CMakeLists.txt b/CMakeLists.txt
index a5b2abf..87691d4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -161,11 +161,13 @@
     DESTINATION ${INJA_INSTALL_INCLUDE_DIR}
     FILES_MATCHING PATTERN "*.hpp"
   )
-  install(
-    DIRECTORY third_party/include/nlohmann
-    DESTINATION ${INJA_INSTALL_INCLUDE_DIR}
-    FILES_MATCHING PATTERN "*.hpp"
-  )
+  if(INJA_USE_EMBEDDED_JSON)
+    install(
+      DIRECTORY third_party/include/nlohmann
+      DESTINATION ${INJA_INSTALL_INCLUDE_DIR}
+      FILES_MATCHING PATTERN "*.hpp"
+    )
+  endif()
   install(
     FILES
       "${CMAKE_CURRENT_BINARY_DIR}/${INJA_CONFIG_PATH}/injaConfig.cmake"