diff --git a/file-collection.cabal b/file-collection.cabal
--- a/file-collection.cabal
+++ b/file-collection.cabal
@@ -1,5 +1,5 @@
 name:                file-collection
-version:             0.1.1.0
+version:             0.1.1.1
 synopsis:            Provide a uniform interface over file archives and directories
 description:         The interface is essentially the same as that provided by
                      `directory`, except each function also take reference to the
@@ -19,7 +19,10 @@
         location: https://github.com/joelwilliamson/file-collection.git
 library
   exposed-modules:     Codec.Archive.FileCollection
-  other-extensions:    FlexibleInstances, UnicodeSyntax
+  other-extensions:    FlexibleContexts,
+                       FlexibleInstances,
+                       TypeFamilies,
+                       UnicodeSyntax
   build-depends:       base >=4.8 && <4.9,
                        bytestring >=0.9 && <0.11,
                        directory >=1.2 && <1.3,