diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # lzlib
 
+## 0.2.0.1
+
+  * Performance improvements
+
 ## 0.2.0.0
 
   * Performance improvements
@@ -7,7 +11,7 @@
   * Change type signatures of compression/decompression functions
 
 ## 0.1.1.1
-  
+
   * Fix distribution
 
 ## 0.1.1.0
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,3 +1,13 @@
 # lzlib
 
 Haskell bindings to [lzlib](https://www.nongnu.org/lzip/lzlib.html).
+
+## Building
+
+Run
+
+```bash
+./bash/setup
+```
+
+to download a few tarballs before running the test suite.
diff --git a/lzlib.cabal b/lzlib.cabal
--- a/lzlib.cabal
+++ b/lzlib.cabal
@@ -1,6 +1,6 @@
 cabal-version:      1.18
 name:               lzlib
-version:            0.2.0.0
+version:            0.2.0.1
 license:            BSD3
 license-file:       LICENSE
 copyright:          Copyright: (c) 2019 Vanessa McHale
@@ -45,6 +45,7 @@
         Codec.Lzip
         Codec.Lzip.Raw
 
+    cc-options:       -O1
     c-sources:        cbits/lzlib.c
     hs-source-dirs:   src
     default-language: Haskell2010
@@ -60,7 +61,7 @@
         bytestring -any
 
     if !flag(cross)
-        build-tool-depends: c2hs:c2hs -any
+        build-tool-depends: c2hs:c2hs >=0.26.1
 
     if impl(ghc >=8.4)
         ghc-options: -Wmissing-export-lists