diff --git a/lib.nix b/lib.nix
index 479a5da..c76c456 100644
--- a/lib.nix
+++ b/lib.nix
@@ -114,7 +114,7 @@ in
           (lib.concatMapStrings (db: ''
             echo "Checking presence of database ${db.name}"
             dbAlreadyExists="$(echo "SELECT 1 AS result FROM pg_database WHERE datname='${db.name}';" | psql --dbname postgres | ${pkgs.gnugrep}/bin/grep -c 'exists = "1"' || true)"
-            echo $dbAlreadyExists
+            echo "$dbAlreadyExists"
           '') initialDatabases)
         else
           "";