diff --git a/cmake/fetch_llvm.cmake b/cmake/fetch_llvm.cmake
index 22688197..574c45a6 100644
--- a/cmake/fetch_llvm.cmake
+++ b/cmake/fetch_llvm.cmake
@@ -31,3 +31,4 @@ FetchContent_Declare(llvmproject
     SOURCE_SUBDIR do_not_add_llvm_subdir_yet
 )
 FetchContent_MakeAvailable(llvmproject)
+FetchContent_GetProperties(llvmproject SOURCE_DIR FETCHCONTENT_SOURCE_DIR_LLVMPROJECT)
diff --git a/cmake/fetch_newlib.cmake b/cmake/fetch_newlib.cmake
index 1413145f..4d7b3723 100644
--- a/cmake/fetch_newlib.cmake
+++ b/cmake/fetch_newlib.cmake
@@ -23,3 +23,4 @@ FetchContent_Declare(newlib
     SOURCE_SUBDIR do_not_add_newlib_subdir
 )
 FetchContent_MakeAvailable(newlib)
+FetchContent_GetProperties(newlib SOURCE_DIR FETCHCONTENT_SOURCE_DIR_NEWLIB)
diff --git a/cmake/fetch_picolibc.cmake b/cmake/fetch_picolibc.cmake
index 65b81880..67a3f3cd 100644
--- a/cmake/fetch_picolibc.cmake
+++ b/cmake/fetch_picolibc.cmake
@@ -29,3 +29,4 @@ FetchContent_Declare(picolibc
     SOURCE_SUBDIR do_not_add_picolibc_subdir
 )
 FetchContent_MakeAvailable(picolibc)
+FetchContent_GetProperties(picolibc SOURCE_DIR FETCHCONTENT_SOURCE_DIR_PICOLIBC)