Add constraints "servant < 0.8" etc per #1689

build-constraints.yaml

@@ -2430,6 +2430,15 @@ packages:
         - bloodhound < 0.11.1.0
         - eventstore < 0.13.1.3
 
+        # https://github.com/fpco/stackage/issues/1689
+        - servant < 0.8
+        - servant-client < 0.8
+        - servant-foreign < 0.8
+        - servant-server < 0.8
+        - servant-docs < 0.8
+        - servant-mock < 0.8
+        - servant-js < 0.8
+
 # end of packages