diff --git a/build/pkgs/giac/spkg-install.in b/build/pkgs/giac/spkg-install.in
index d7ecb5a4cef..c20671a7b88 100644
--- a/build/pkgs/giac/spkg-install.in
+++ b/build/pkgs/giac/spkg-install.in
@@ -16,6 +16,9 @@ if [ `uname -m` = "ppc64" ]; then
     CPPFLAGS="-Dx86_64 $CPPFLAGS"
 fi
 
+# #31563: Kick the can down the road
+CPPFLAGS="-DUSE_OBJET_BIDON=1 $CPPFLAGS"
+
 # Using pari in a C++17 file with "using namespace std doesn't
 # work due to a conflict between std::rank and pari's rank
 # -std=c++17 is in the default flags on conda;