diff -r 5655af3ea5bd -r bbb61a9cb99a src/Tools/Haskell/Test.thy
--- a/src/Tools/Haskell/Test.thy	Thu Dec 13 15:21:34 2018 +0100
+++ b/src/Tools/Haskell/Test.thy	Thu Dec 13 15:32:54 2018 +0100
@@ -18,7 +18,7 @@
       val _ =
         GHC.new_project tmp_dir
           {name = "isabelle",
-           depends = ["bytestring", "network", "split", "utf8-string"],
+           depends = ["bytestring", "network", "split", "utf8-string", "uuid"],
            modules = modules};
 
       val (out, rc) =