diff --git a/build-constraints.yaml b/build-constraints.yaml
index a000fd3e..57f84507 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1547,6 +1547,9 @@ packages:
 
     "Stanislav Chernichkin <schernichkin@gmail.com> @schernichkin":
         - partial-isomorphisms
+        
+    "Christoph Breitkopf <chbreitkopf@gmail.com> @bokesan":
+        - IntervalMap
 
     "Stackage upper bounds":
         # https://github.com/fpco/stackage/issues/537