diff --git a/libcxxabi/src/CMakeLists.txt b/libcxxabi/src/CMakeLists.txt
--- a/libcxxabi/src/CMakeLists.txt
+++ b/libcxxabi/src/CMakeLists.txt
@@ -260,6 +260,16 @@
 
   # Merge the libc++abi.a and libunwind.a into one.
   if(LIBCXXABI_USE_LLVM_UNWINDER AND LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY)
+    if(LIBCXXABI_UNWIND_LIBRARY_PATH)
+      set(MERGE_ARCHIVES_SEARCH_PATHS "-L${LIBCXXABI_UNWIND_LIBRARY_PATH}")
+    endif()
+
+    if(TARGET unwind_static)
+      set(MERGE_ARCHIVES_UNWIND "$<TARGET_LINKER_FILE:unwind_static>")
+    else()
+      set(MERGE_ARCHIVES_UNWIND "${CMAKE_STATIC_LIBRARY_PREFIX}unwind${CMAKE_STATIC_LIBRARY_SUFFIX}")
+    endif()
+
     add_custom_command(TARGET cxxabi_static POST_BUILD
       COMMAND ${PYTHON_EXECUTABLE} ${LIBCXXABI_LIBCXX_PATH}/utils/merge_archives.py
       ARGS
@@ -267,7 +277,8 @@
         --ar "${CMAKE_AR}"
         ${MERGE_ARCHIVES_LIBTOOL}
         "$<TARGET_LINKER_FILE:cxxabi_static>"
-        "$<TARGET_LINKER_FILE:unwind_static>"
+        "${MERGE_ARCHIVES_UNWIND}"
+        "${MERGE_ARCHIVES_SEARCH_PATHS}"
       WORKING_DIRECTORY ${LIBCXXABI_BUILD_DIR}
     )
   endif()