diff --git a/libc/utils/UnitTest/CMakeLists.txt b/libc/utils/UnitTest/CMakeLists.txt
--- a/libc/utils/UnitTest/CMakeLists.txt
+++ b/libc/utils/UnitTest/CMakeLists.txt
@@ -6,3 +6,4 @@
 )
 target_include_directories(LibcUnitTest PUBLIC ${LIBC_SOURCE_DIR})
 add_dependencies(LibcUnitTest standalone_cpp)
+target_link_libraries(LibcUnitTest PUBLIC libc_test_utils)
diff --git a/libc/utils/testutils/CMakeLists.txt b/libc/utils/testutils/CMakeLists.txt
--- a/libc/utils/testutils/CMakeLists.txt
+++ b/libc/utils/testutils/CMakeLists.txt
@@ -1,8 +1,10 @@
-add_library(
+if(CMAKE_HOST_UNIX)
+  set(EFFile ExecuteFunctionUnix.cpp)
+endif()
+
+add_llvm_library(
   libc_test_utils
+  ${EFFile}
   ExecuteFunction.h
+  LINK_COMPONENTS Support
 )
-
-if(CMAKE_HOST_UNIX)
-  target_sources(libc_test_utils PRIVATE ExecuteFunctionUnix.cpp)
-endif()