--- a/src/core/lib/gpr/tmpfile_posix.cc
+++ b/src/core/lib/gpr/tmpfile_posix.cc
@@ -39,7 +39,7 @@
 
   if (tmp_filename != nullptr) *tmp_filename = nullptr;
 
-  gpr_asprintf(&filename_template, "/tmp/%s_XXXXXX", prefix);
+  gpr_asprintf(&filename_template, "@TERMUX_PREFIX@/tmp/%s_XXXXXX", prefix);
   GPR_ASSERT(filename_template != nullptr);
 
   fd = mkstemp(filename_template);