--- setup.py.orig
+++ setup.py
@@ -307,7 +307,7 @@
     march = '-march=native' if native_optimizations else ''
     cflags_ = os.environ.get(
         'OVERRIDE_CFLAGS', (
-            f'-Wextra {float_conversion} -Wno-missing-field-initializers -Wall -Wstrict-prototypes {std}'
+            f'-Wextra {float_conversion} -Wno-missing-field-initializers -Wno-deprecated-declarations -Wall -Wstrict-prototypes {std}'
             f' {werror} {optimize} {sanitize_flag} -fwrapv {stack_protector} {missing_braces}'
             f' -pipe {march} -fvisibility=hidden {fortify_source}'
         )