Only in orig: 0.2
diff -ru orig/transformers-compat.cabal new/transformers-compat.cabal
--- orig/transformers-compat.cabal	2014-05-26 16:42:03.281628769 +0300
+++ new/transformers-compat.cabal	2014-05-26 16:42:03.000000000 +0300
@@ -37,17 +37,6 @@
   type: git
   location: git://github.com/ekmett/transformers-compat.git
 
-flag two
-  default: False
-  description: Use transformers 0.2. This must be selected manually and should
-    probably only be used on older GHCs around 7.0.x.
-  manual: False
-
-flag three
-  default: False
-  manual: False
-  description: Use transformers 0.3. This should toggle on/off automatically.
-
 library
   build-depends:
     base >= 4.3 && < 5
@@ -55,24 +44,10 @@
   other-modules:
     Paths_transformers_compat
 
-  if flag(three)
-    hs-source-dirs: 0.3
-    build-depends: transformers >= 0.3 && < 0.4
-  else
-    if flag(two)
-      hs-source-dirs: 0.2 0.3
-      build-depends: transformers >= 0.2 && < 0.3
-    else
-      build-depends: transformers >= 0.4.1 && < 0.5
-
-  if flag(two)
-    exposed-modules:
-      Control.Applicative.Backwards
-      Control.Applicative.Lift
-      Data.Functor.Reverse
+  hs-source-dirs: 0.3
+  build-depends: transformers >= 0.3 && < 0.4
 
-  if flag(two) || flag(three)
-    exposed-modules:
+  exposed-modules:
       Control.Monad.Trans.Except
       Control.Monad.Signatures
       Data.Functor.Classes