diff --git a/install b/install
index 841eb6d..170a48d 100755
--- a/install
+++ b/install
@@ -96,19 +96,22 @@ fi
 git config --global user.email "paul@blacksun.org.uk"
 git config --global user.name "Paul Walker"
 
-git clone https://github.com/rbenv/rbenv.git "$HOME/.rbenv"
-git clone https://github.com/rbenv/ruby-build.git "$HOME/.rbenv/plugins/ruby-build"
+if [ ! -d "$HOME/.rbenv" ] ; then
+  git clone https://github.com/rbenv/rbenv.git "$HOME/.rbenv"
+  git clone https://github.com/rbenv/ruby-build.git "$HOME/.rbenv/plugins/ruby-build"
+fi
 
 if [ ! -d "$HOME/.asdf" ] ; then
   git clone https://github.com/asdf-vm/asdf.git "$HOME/.asdf"
 fi
 
 # Add and install these ones.
-for plugin in golang erlang elixir clojure ; do
-  asdf plugin add $plugin
-  asdf install $plugin latest
-  asdf global $plugin latest
+for plugin in golang erlang elixir clojure ripgrep sbcl ; do
+  asdf plugin add $plugin && \
+    asdf install $plugin latest && \
+    asdf global $plugin latest
 done
+
 # Just add these, for now.
 asdf plugin add python
 asdf plugin add gohugo