allow build settings to be overriden by adding mk/validate.mk

[ghc-hetmet.git] / compiler / coreSyn / CoreSubst.lhs

diff --git a/compiler/coreSyn/CoreSubst.lhs b/compiler/coreSyn/CoreSubst.lhs
index 8306c04..1c81d88 100644 (file)
--- a/compiler/coreSyn/CoreSubst.lhs
+++ b/compiler/coreSyn/CoreSubst.lhs
@@ -45,6 +45,8 @@ import Outputable
 import PprCore         ()              -- Instances
 import Util
 import FastTypes
+
+import Data.List
 \end{code}