diff --git a/build-constraints.yaml b/build-constraints.yaml
index 2ce11daf..8594a8fd 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1892,8 +1892,8 @@ skipped-builds:
     - Win32-notify
     - Win32-extras
 
-    # The Docker image we use does not have access to the correct
-    # C libraries. See: https://github.com/fpco/stackage/issues/696
+    # The Docker image needs libsystemd-dev from Ubuntu 15.04+ for this.
+    # See: https://github.com/fpco/stackage/issues/696
     - libsystemd-journal