diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1b673f28..e20cee3c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7237,6 +7237,10 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/6588
         - unix-compat < 0.6
 
+        # https://github.com/commercialhaskell/stackage/issues/6605
+        - hledger-iadd < 0
+        - hledger-interest < 0
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of