https://github.com/libjxl/libjxl/issues/2167

Index: lib/jpegli.cmake
--- lib/jpegli.cmake.orig
+++ lib/jpegli.cmake
@@ -127,6 +127,7 @@ set(JPEGLI_LIBJPEG_OBJ_COMPILE_DEFINITIONS
 )
 
 add_library(jpegli-libjpeg-obj OBJECT jpegli/libjpeg_wrapper.cc)
+target_include_directories(jpegli-libjpeg-obj PUBLIC "${JPEG_INCLUDE_DIRS}")
 target_compile_options(jpegli-libjpeg-obj PRIVATE ${JPEGXL_INTERNAL_FLAGS})
 target_compile_options(jpegli-libjpeg-obj PUBLIC ${JPEGXL_COVERAGE_FLAGS})
 set_property(TARGET jpegli-libjpeg-obj PROPERTY POSITION_INDEPENDENT_CODE ON)
