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-rw-r--r--hadrian/src/Hadrian/Expression.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/hadrian/src/Hadrian/Expression.hs b/hadrian/src/Hadrian/Expression.hs
index 53c86de68b..6630a65c7a 100644
--- a/hadrian/src/Hadrian/Expression.hs
+++ b/hadrian/src/Hadrian/Expression.hs
@@ -8,6 +8,7 @@ module Hadrian.Expression (
-- ** Predicates
(?), input, inputs, output, outputs, VerboseCommand (..), verboseCommand,
+ ToPredicate(..),
-- ** Evaluation
interpret, interpretInContext,