diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5167e8db..858714b9 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4293,9 +4293,9 @@ packages:
 
     "Satoshi Egi <egi@egison.org> @egisatoshi":
         - backtracking
-        - egison
+        - egison < 4.1.0      # https://github.com/egison/egison/issues/248
         - mini-egison
-        - sweet-egison
+      # - sweet-egison
         - egison-pattern-src
         - egison-pattern-src-th-mode