diff --git a/src/Sound/Tidal/Stepwise.hs b/src/Sound/Tidal/Stepwise.hs
index be568c29..2ba8fa29 100644
--- a/src/Sound/Tidal/Stepwise.hs
+++ b/src/Sound/Tidal/Stepwise.hs
@@ -19,14 +19,13 @@
 
 module Sound.Tidal.Stepwise where
 
-import           Data.Containers.ListUtils (nubOrd)
-import           Data.List                 (sort, transpose)
-import           Data.Maybe                (catMaybes, fromMaybe, isJust)
+import           Data.List           (sort, transpose)
+import           Data.Maybe          (catMaybes, fromMaybe, isJust)
 
 import           Sound.Tidal.Core
 import           Sound.Tidal.Pattern
-import           Sound.Tidal.UI            (while)
-import           Sound.Tidal.Utils         (applyWhen, pairs)
+import           Sound.Tidal.UI      (while)
+import           Sound.Tidal.Utils   (applyWhen, nubOrd, pairs)
 
 _lcmtactus :: [Pattern a] -> Maybe Time
 _lcmtactus pats = foldl1 lcmr <$> (sequence $ map tactus pats)
diff --git a/src/Sound/Tidal/Utils.hs b/src/Sound/Tidal/Utils.hs
index 2d745da0..e8f9986f 100644
--- a/src/Sound/Tidal/Utils.hs
+++ b/src/Sound/Tidal/Utils.hs
@@ -1,3 +1,6 @@
+{-# LANGUAGE BangPatterns #-}
+{-# LANGUAGE CPP          #-}
+
 module Sound.Tidal.Utils where
 
 {-
@@ -21,6 +24,15 @@ module Sound.Tidal.Utils where
 import           Data.List (delete)
 import           System.IO (hPutStrLn, stderr)
 
+import           Data.Set  (Set)
+import qualified Data.Set  as Set
+-- import qualified Data.IntSet as IntSet
+-- import Data.IntSet (IntSet)
+#ifdef __GLASGOW_HASKELL__
+import           GHC.Exts  (build)
+#endif
+
+
 writeError :: String -> IO ()
 writeError = hPutStrLn stderr
 
@@ -110,3 +122,56 @@ applyWhen False _ x = x
 -- pair up neighbours in list
 pairs :: [a] -> [(a,a)]
 pairs rs = zip rs (tail rs)
+
+-- The following is from Data.Containers.ListUtils, (c) Gershom Bazerman 2018,
+-- Used under a BSD 3-clause license
+-- https://hackage.haskell.org/package/containers
+
+nubOrd :: Ord a => [a] -> [a]
+nubOrd = nubOrdOn id
+
+{-# INLINE nubOrd #-}
+nubOrdOn :: Ord b => (a -> b) -> [a] -> [a]
+nubOrdOn f = \xs -> nubOrdOnExcluding f Set.empty xs
+{-# INLINE nubOrdOn #-}
+
+nubOrdOnExcluding :: Ord b => (a -> b) -> Set b -> [a] -> [a]
+nubOrdOnExcluding f = go
+  where
+    go _ [] = []
+    go s (x:xs)
+      | fx `Set.member` s = go s xs
+      | otherwise = x : go (Set.insert fx s) xs
+      where !fx = f x
+
+#ifdef __GLASGOW_HASKELL__
+{-# INLINABLE [1] nubOrdOnExcluding #-}
+
+{-# RULES
+-- Rewrite to a fusible form.
+"nubOrdOn" [~1] forall f as s. nubOrdOnExcluding  f s as =
+  build (\c n -> foldr (nubOrdOnFB f c) (constNubOn n) as s)
+
+-- Rewrite back to a plain form
+"nubOrdOnList" [1] forall f as s.
+    foldr (nubOrdOnFB f (:)) (constNubOn []) as s =
+       nubOrdOnExcluding f s as
+ #-}
+
+nubOrdOnFB :: Ord b
+           => (a -> b)
+           -> (a -> r -> r)
+           -> a
+           -> (Set b -> r)
+           -> Set b
+           -> r
+nubOrdOnFB f c x r s
+  | fx `Set.member` s = r s
+  | otherwise = x `c` r (Set.insert fx s)
+  where !fx = f x
+{-# INLINABLE [0] nubOrdOnFB #-}
+
+constNubOn :: a -> b -> a
+constNubOn x _ = x
+{-# INLINE [0] constNubOn #-}
+#endif
diff --git a/tidal.cabal b/tidal.cabal
index e1279e46..477a8783 100644
--- a/tidal.cabal
+++ b/tidal.cabal
@@ -58,7 +58,7 @@ library
                        Paths_tidal
   Build-depends:
       base >=4.8 && <5
-    , containers >= 0.6 && < 0.8
+    , containers < 0.8
     , colour < 2.4
     , hosc >= 0.20 && < 0.21
     , text < 2.2