diff --git a/build-constraints.yaml b/build-constraints.yaml
index c7b3fae3..ec25769a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1640,6 +1640,7 @@ packages:
         - optima
         - partial-handler
         - postgresql-binary
+        - postgresql-connection-string
         - postgresql-syntax
         - primitive-extras
         - ptr-poker
@@ -7337,6 +7338,7 @@ packages:
         - polysemy-zoo < 0 # tried polysemy-zoo-0.8.2.0, but its *library* requires text >=1.1.0 && < 2.1 and the snapshot contains text-2.1.3
         - pontarius-xmpp < 0 # tried pontarius-xmpp-0.5.7.2, but its *library* requires the disabled package: cryptohash
         - pontarius-xmpp-extras < 0 # tried pontarius-xmpp-extras-0.1.0.12, but its *library* requires the disabled package: pontarius-xmpp
+        - postgresql-connection-string < 0 # tried postgresql-connection-string-0.1.0.3, but its *library* requires QuickCheck >=2.14 && < 2.16 and the snapshot contains QuickCheck-2.16.0.0
         - postgresql-migration < 0 # tried postgresql-migration-0.2.1.8, but its *library* requires time >=1.4 && < 1.14 and the snapshot contains time-1.14
         - postgresql-query < 0 # tried postgresql-query-3.10.0, but its *library* requires the disabled package: inflections
         - postgresql-simple-url < 0 # tried postgresql-simple-url-0.2.1.0, but its *library* requires base >=4.6 && < 4.20 and the snapshot contains base-4.21.1.0