diff --git a/build-constraints.yaml b/build-constraints.yaml
index eb85dc6f..3deb8f2b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -11,7 +11,7 @@ packages:
         - wreq-stringless
 
     "Olaf Chitil <oc@kent.ac.uk> @OlafChitil":
-        []
+        - FPretty
 
     "Maarten Faddegon <stackage@maartenfaddegon.nl> @MaartenFaddegon":
         - libgraph