diff --git a/b9.cabal b/b9.cabal
--- a/b9.cabal
+++ b/b9.cabal
@@ -1,5 +1,5 @@
 name:                b9
-version:             0.5.2
+version:             0.5.3
 
 synopsis:            A tool and library for building virtual machine images.
 
@@ -48,7 +48,7 @@
 copyright:           2015 Sven Heyll <svh@posteo.de>
 category:            Development
 build-type:          Simple
-extra-source-files:  README.md, build_and_run.sh, build_and_test.sh, build_haddock.sh,
+extra-source-files:  README.md, build_and_test.sh, build_haddock.sh,
                      LICENSE, TODO.org, Setup.hs, b9.cabal, .gitignore, prepare_release.sh, .travis.yml, CONTRIBUTORS
 cabal-version:       >=1.10
 
@@ -96,7 +96,7 @@
                    , directory
                    , filepath
                    , mtl
-                   , old-locale
+                   , time >= 1.5.0 && < 2
                    , parsec
                    , pretty-show
                    , pretty
@@ -106,7 +106,6 @@
                    , syb
                    , template
                    , text
-                   , time
                    , transformers
                    , unordered-containers
                    , vector
diff --git a/build_and_run.sh b/build_and_run.sh
deleted file mode 100644
--- a/build_and_run.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/sh
-
-# Execute 'b9', if necessary compile it.
-
-set -e
-
-PATH="$(pwd)/.cabal-sandbox/bin:$PATH"
-
-cabal install
-./run.sh $@
diff --git a/build_and_test.sh b/build_and_test.sh
--- a/build_and_test.sh
+++ b/build_and_test.sh
@@ -5,8 +5,6 @@
 #
 set -exu
 
-PATH="$(pwd)/.cabal-sandbox/bin:$PATH"
-
 cabal install -j --enable-tests --dependencies-only
 cabal configure --enable-tests --disable-optimization
 cabal build
diff --git a/build_haddock.sh b/build_haddock.sh
--- a/build_haddock.sh
+++ b/build_haddock.sh
@@ -4,6 +4,4 @@
 #
 set -xeu
 
-PATH="$(pwd)/.cabal-sandbox/bin:$PATH"
-
 cabal haddock
diff --git a/prepare_release.sh b/prepare_release.sh
--- a/prepare_release.sh
+++ b/prepare_release.sh
@@ -9,8 +9,7 @@
 #
 set -eu
 
-PATH="$(pwd)/.cabal-sandbox/bin:$PATH"
-
+cabal clean
 ./build_and_test.sh
 ./build_haddock.sh
 cabal check
diff --git a/src/lib/B9/B9Monad.hs b/src/lib/B9/B9Monad.hs
--- a/src/lib/B9/B9Monad.hs
+++ b/src/lib/B9/B9Monad.hs
@@ -27,7 +27,6 @@
 import           System.Directory
 import           System.Exit
 import           System.FilePath
--- import qualified System.Locale ( defaultTimeLocale )
 import           System.Random ( randomIO )
 import           Text.Printf
 import           Control.Concurrent.Async (Concurrently (..))