foo.diff

diff --git a/rustup-init.sh b/rustup-init.sh
index 3815d2f1..8411bfef 100755
--- a/rustup-init.sh
+++ b/rustup-init.sh
@@ -13,12 +13,12 @@
 # install rustup. It just does platform detection, downloads the installer
 # and runs it.
 
-set -u
-
 if [ -z "$RUSTUP_UPDATE_ROOT" ]; then
     RUSTUP_UPDATE_ROOT="https://static.rust-lang.org/rustup"
 fi
 
+set -u
+
 #XXX: If you change anything here, please make the same changes in setup_mode.rs
 usage() {
     cat 1>&2 <<EOF