diff --git a/src/args/make-python-pypi-environment/default.nix b/src/args/make-python-pypi-environment/default.nix
index 176a69de..40e837c6 100644
--- a/src/args/make-python-pypi-environment/default.nix
+++ b/src/args/make-python-pypi-environment/default.nix
@@ -104,7 +104,7 @@ assert builtins.any (_: _) [
             inherit name;
             inherit sha256;
             inherit url;
-            curlOptsList = ["--retry" "3"];
+            curlOptsList = ["--retry" "3" "--fail"];
           };
         })
         (builtins.concatLists [