diff --git a/depends/toolchain.cmake.in b/depends/toolchain.cmake.in
index c7cd8c4930e1b..0e8cddc01baab 100644
--- a/depends/toolchain.cmake.in
+++ b/depends/toolchain.cmake.in
@@ -154,7 +154,7 @@ endif()
 
 if("@multiprocess@" STREQUAL "1")
   set(ENABLE_IPC ON CACHE BOOL "")
-  set(Libmultiprocess_EXTERNAL_MPGEN "@depends_prefix@/native/bin/mpgen" CACHE PATH "")
+  set(Libmultiprocess_EXTERNAL_MPGEN "${CMAKE_CURRENT_LIST_DIR}/native/bin/mpgen" CACHE FILEPATH "")
   set(CAPNP_EXECUTABLE "${CMAKE_CURRENT_LIST_DIR}/native/bin/capnp" CACHE FILEPATH "")
   set(CAPNPC_CXX_EXECUTABLE "${CMAKE_CURRENT_LIST_DIR}/native/bin/capnpc-c++" CACHE FILEPATH "")
 else()