diff --git a/haskelloids.cabal b/haskelloids.cabal
index 0ccce77..a734c52 100644
--- a/haskelloids.cabal
+++ b/haskelloids.cabal
@@ -75,7 +75,7 @@ executable haskelloids
                      , random
                      , linear
                      , stm
-                     , nanovg
+                     , nanovg >= 0.6
   
   -- Directories containing source files.
   hs-source-dirs:      src
diff --git a/shell.nix b/shell.nix
index 91e20db..1a42aed 100644
--- a/shell.nix
+++ b/shell.nix
@@ -56,6 +56,7 @@ let
       ];
       librarySystemDepends = [ ];
       libraryToolDepends = [  ];
+      configureFlags = [ "-fdebug" ];
       testHaskellDepends = [ ];
       homepage = "https://github.com/nek0/affection";
       description = "A simple Game Engine in Haskell using SDL";