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authorJoey Hess2018-12-30 14:27:38 -0400
committerJoey Hess2018-12-30 14:27:38 -0400
commit714374151c9ed2297ac9a23a9ebd8344668fb426 (patch)
tree66e593005b882e3f10e1b31328a17477a31108a3 /src/Propellor/Types.hs
parentdf3f7637560114d47450c25c3cc0e9a3d2068f5f (diff)
Fix build with ghc 8.6.3
Ghc started complaining that the SingI constraints needs UndecidableInstances. I'm not clear why, when it used to work without that extension. UndecidableInstances were already used in MetaTypes..
Diffstat (limited to 'src/Propellor/Types.hs')
-rw-r--r--src/Propellor/Types.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/Propellor/Types.hs b/src/Propellor/Types.hs
index e10e0f5b..7052bf92 100644
--- a/src/Propellor/Types.hs
+++ b/src/Propellor/Types.hs
@@ -1,5 +1,6 @@
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE UndecidableInstances #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE TypeFamilies #-}