diff --git a/build-constraints.yaml b/build-constraints.yaml
index a9cb3812..37c819d2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2666,6 +2666,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/2099
         - websockets < 0.10.0.0
+
+        # https://github.com/fpco/stackage/issues/2100
+        - pandoc < 1.19
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of