diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4a017807..9de5a478 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -958,6 +958,7 @@ packages:
 
     "Ben Gamari <ben@smart-cactus.org> @bgamari":
         - vector-fftw < 0 # GHC 8.4 via base-4.11.0.0
+        - cborg-json
 
     "Roman Cheplyaka <roma@ro-che.info> @feuerbach":
         - action-permutations