diff --git a/retroclash-sim.cabal b/retroclash-sim.cabal
--- a/retroclash-sim.cabal
+++ b/retroclash-sim.cabal
@@ -3,11 +3,9 @@
 -- This file has been generated from package.yaml by hpack version 0.34.4.
 --
 -- see: https://github.com/sol/hpack
---
--- hash: 4978ab887c6a454f99ca9aaf7e15110a6b7360da275ae11d0437b9b59f1558e0
 
 name:           retroclash-sim
-version:        0.1.0
+version:        0.1.1
 synopsis:       High-level simulators from the book "Retrocomputing with Clash"
 description:    A library of functionality useful when simulating retro-computers:
                 .
@@ -74,9 +72,9 @@
       array
     , arrows
     , base >=4.14 && <5
-    , clash-ghc >=1.4.2 && <1.5
-    , clash-lib >=1.4.2 && <1.5
-    , clash-prelude >=1.4.2 && <1.5
+    , clash-ghc >=1.4.2 && <1.5 || >=1.6.1 && <1.7
+    , clash-lib >=1.4.2 && <1.5 || >=1.6.1 && <1.7
+    , clash-prelude >=1.4.2 && <1.5 || >=1.6.1 && <1.7
     , ghc-typelits-extra
     , ghc-typelits-knownnat
     , ghc-typelits-natnormalise
diff --git a/src/RetroClash/Sim/SDL.hs b/src/RetroClash/Sim/SDL.hs
--- a/src/RetroClash/Sim/SDL.hs
+++ b/src/RetroClash/Sim/SDL.hs
@@ -15,7 +15,6 @@
     , packColor
     ) where
 
-import Prelude
 import Clash.Prelude hiding (lift)
 import RetroClash.Utils