diff --git a/build-constraints.yaml b/build-constraints.yaml
index 723209ef..c08deb17 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1890,12 +1890,12 @@ packages:
         - Network-NineP
 
     "Oliver Charles <ollie@ocharles.org.uk> @ocharles":
-        - diff3 < 0 # build failure with GHC 8.4
-        - exhaustive < 0 # GHC 8.4 via base-4.11.0.0
-        - libsystemd-journal < 0 # GHC 8.4 via base-4.11.0.0
-        - network-carbon < 0 # GHC 8.4 via base-4.11.0.0
-        - tasty-rerun < 0 # GHC 8.4 via base-4.11.0.0
-        - logging-effect < 0 # GHC 8.4 via base-4.11.0.0
+        - diff3
+        - exhaustive
+        - libsystemd-journal
+        - network-carbon
+        - tasty-rerun
+        - logging-effect
         # - reactive-banana # pqueue-1.4.1
 
     "Antoni Silvestre <antoni.silvestre@gmail.com> @asilvestre":