diff --git a/nix/build-all.py b/nix/build-all.py
index 86ea3b459e..286c12f865 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -59,6 +59,10 @@ import multiprocessing
 import platform
 import sysconfig
 
+# @todo temporary for expired mpfr.org certificate on 2023-04-08
+import ssl
+ssl._create_default_https_context = ssl._create_unverified_context
+
 from urllib.request import urlretrieve