diff --git a/setup-keter.sh b/setup-keter.sh
index 0045335..f540cb5 100755
--- a/setup-keter.sh
+++ b/setup-keter.sh
@@ -4,8 +4,10 @@ set -o errexit -o nounset -o xtrace
 # Quick start:
 # wget -O - https://raw.github.com/snoyberg/keter/master/setup-keter.sh | bash -ex
 
+LSB_RELEASE=$(lsb_release -sc)
+
 sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 575159689BEFB442
-echo "deb http://download.fpcomplete.com/ubuntu \"$(lsb_release -sc)\" main"|sudo tee /etc/apt/sources.list.d/fpco.list
+echo "deb http://download.fpcomplete.com/ubuntu \"${LSB_RELEASE}\" main"|sudo tee /etc/apt/sources.list.d/fpco.list
 
 sudo apt-get update
 sudo apt-get -y install postgresql stack zlib1g-dev