diff --git a/installers/install-nix.sh b/installers/install-nix.sh
index 0d00675..458cc4d 100755
--- a/installers/install-nix.sh
+++ b/installers/install-nix.sh
@@ -9,7 +9,7 @@ set -x
 # Abort installation if Nix is already installed
 if [ -d /nix/store ]; then
   exit 0
-elif ! [ -O /nix ]; then
+elif [ -d /nix ] && ! [ -O /nix ]; then
   # If we don't own /nix use sudo to chown it.
   # If we can't sudo then nothing we do here will work so we just let this fail
   sudo chown $UID /nix