diff --git a/bootstrap.sh b/bootstrap.sh
index d2f99a3..7f85c97 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -13,6 +13,7 @@
 set -euo pipefail
 
 REPO_DIR="$(cd "$(dirname "$0")" && pwd)"
+OS="$(uname -s)"
 GUTASK_DIR="${HOME}/gutasktool"
 GITEA_HOST="ramanujan.glitch.university"
 GITEA_PORT=2222