diff --git a/build-constraints.yaml b/build-constraints.yaml
index eb4803cf4..7ce84b538 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -618,6 +618,7 @@ packages:
         - cabal-sort
         - calendar-recycling
         - checksum
+        - chemical-equation
         - coinor-clp
         - combinatorial
         - comfort-graph
@@ -700,6 +701,7 @@ packages:
         - wraxml
         - xml-basic
         - youtube
+        - zip2tar
         - prelude-compat
         - fft
         - carray