haskellPackages.lucid: disable failing test case

The test in question seems to fail because it depended on the ordering
of things returned from /unordered/-containers of all things. This seems
to have changed in the recent upgrade 0.2.15.0 -> 0.2.16.0 in LTS 18.

pkgs/development/haskell-modules/configuration-common.nix

@@ -2137,4 +2137,13 @@ self: super: {
   # https://github.com/ChrisPenner/jet/issues/1
   jet = doJailbreak super.jet;
 
+  # Upgrade of unordered-containers in Stackage causes ordering-sensitive test to fail
+  # https://github.com/chrisdone/lucid/issues/123
+  # https://github.com/commercialhaskell/stackage/issues/6366
+  lucid = assert super.lucid == "2.9.12.1"; overrideCabal (drv: {
+    testFlags = [
+      "--skip" "/attributes-with/mixed/"
+    ] ++ drv.testFlags or [];
+  }) super.lucid;
+
 } // import ./configuration-tensorflow.nix {inherit pkgs haskellLib;} self super