diff --git a/src/Stack/Fetch.hs b/src/Stack/Fetch.hs
index 55f0388db9..d3c45c0394 100644
--- a/src/Stack/Fetch.hs
+++ b/src/Stack/Fetch.hs
@@ -62,7 +62,7 @@ import qualified Data.List.NonEmpty             as NE
 import           Data.Map                       (Map)
 import qualified Data.Map                       as Map
 import           Data.Maybe                     (maybeToList, catMaybes)
-import           Data.Monoid                    ((<>))
+import           Data.Monoid
 import           Data.Set                       (Set)
 import qualified Data.Set                       as Set
 import           Data.String                    (fromString)
diff --git a/stack-7.8.yaml b/stack-7.8.yaml
index 364267bf00..759479fc26 100644
--- a/stack-7.8.yaml
+++ b/stack-7.8.yaml
@@ -38,3 +38,4 @@ extra-deps:
 - x509-system-1.6.3
 - http-client-tls-0.2.4
 - connection-0.2.5
+- monad-unlift-0.1.1.0