diff --git a/build-constraints.yaml b/build-constraints.yaml
index 15ff50d9..756f99fc 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8,6 +8,9 @@ cabal-format-version: "2.2"
 # Constraints for brand new builds
 packages:
 
+    "Mateusz Karbowy <mateusz.karbowy@gmail.com> @obszczymucha":
+        - parsec-numbers
+
     "Joshua Grosso <jgrosso256@gmail.com> @jgrosso":
         - axel