diff --git a/libcxxabi/src/cxa_demangle.cpp b/libcxxabi/src/cxa_demangle.cpp
--- a/libcxxabi/src/cxa_demangle.cpp
+++ b/libcxxabi/src/cxa_demangle.cpp
@@ -10,6 +10,11 @@
 // file does not yet support:
 //   - C++ modules TS
 
+// We have to avoid any references to the libc++ dylib, so we
+// explicitly disable assertions here (as that could result in
+// a call to __libcpp_verbose_abort()).
+#define _LIBCPP_ENABLE_ASSERTIONS 0
+
 #include "demangle/ItaniumDemangle.h"
 #include "__cxxabi_config.h"
 #include <cassert>