diff --git a/CentOS6.md b/CentOS6.md
index da1546c..1401de9 100644
--- a/CentOS6.md
+++ b/CentOS6.md
@@ -4,12 +4,14 @@
     sudo ln -s /usr/lib64/libgmp.so.3  /usr/lib64/libgmp.so.10
 
 # Get Haskell and build it
-#### From https://www.haskell.org/platform/linux.html#linux-generic 
-    pushd "$(mktemp -d)"
+#### Based on https://www.haskell.org/platform/linux.html#linux-generic 
+    dir="$(mktemp -d)"
+    pushd "$dir"
     wget https://haskell.org/platform/download/7.10.2/haskell-platform-7.10.2-a-unknown-linux-deb7.tar.gz
     tar xvzf haskell-platform-7.10.2-a-unknown-linux-deb7.tar.gz
     ./install-haskell-platform.sh
     popd
+    rm -r "$dir"
 # Install shellcheck
     cabal install shellcheck