diff --git a/dist/build/testStub/testStub-tmp/testStub.hs b/dist/build/testStub/testStub-tmp/testStub.hs
deleted file mode 100644
--- a/dist/build/testStub/testStub-tmp/testStub.hs
+++ /dev/null
@@ -1,5 +0,0 @@
-module Main ( main ) where
-import Distribution.Simple.Test ( stubMain )
-import Data.Hash.SL2.Test ( tests )
-main :: IO ()
-main = stubMain tests
diff --git a/hwsl2.cabal b/hwsl2.cabal
--- a/hwsl2.cabal
+++ b/hwsl2.cabal
@@ -10,7 +10,7 @@
 -- PVP summary:      +-+------- breaking API changes
 --                   | | +----- non-breaking API additions
 --                   | | | +--- code changes with no API change
-version:             0.3.1.0
+version:             0.3.1.1
 
 -- A short (one-line) description of the package.
 synopsis:            Hashing with SL2
@@ -68,7 +68,7 @@
 
 flag avx2
   description:        Enable AVX 2 optimisations.
-  default:            True
+  default:            False
 
 library
   -- Modules exported by the library.