diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1256dc47..943af9f5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3694,7 +3694,7 @@ packages:
         - hledger-iadd < 0 # 1.3.18 has megaparsec < 9.3
 
     "Roy Levien <royl@aldaron.com> @orome":
-        - crypto-enigma
+        - crypto-enigma < 0 # https://github.com/orome/crypto-enigma-hs/issues/36
 
     "Boldizsár Németh <nboldi@elte.hu> @nboldi":
         - instance-control