diff --git a/containers-benchmark.cabal b/containers-benchmark.cabal
--- a/containers-benchmark.cabal
+++ b/containers-benchmark.cabal
@@ -1,5 +1,5 @@
 Name:                containers-benchmark
-Version:             1.0
+Version:             1.0.0.1
 Synopsis:            Extensive benchmark suite for containers package.
 Description:         This package evaluates performance of a containers package
                      from multiple perspectives.
diff --git a/scripts/custom_containers.sh b/scripts/custom_containers.sh
--- a/scripts/custom_containers.sh
+++ b/scripts/custom_containers.sh
@@ -17,7 +17,11 @@
 for c in Map Set IntMap IntSet
 do
   cat "$1/Data/$c.hs" | sed '
-    1i {-# OPTIONS_GHC '"$FLAGS"' #-}
-    s/Data\.\(IntMap\|IntSet\|Map\|Set\)/Container.\1/
+    1i\
+{-# OPTIONS_GHC '"$FLAGS"' #-}
+    s/Data\.IntMap/Container.IntMap/
+    s/Data\.IntSet/Container.IntSet/
+    s/Data\.Map/Container.Map/
+    s/Data\.Set/Container.Set/
   ' >../src/Container/$c.hs
 done