diff --git a/make_chroot.sh b/make_chroot.sh
index 54e8fa9fa1..63a5ad0240 100755
--- a/make_chroot.sh
+++ b/make_chroot.sh
@@ -17,8 +17,9 @@
 # The path to common.sh should be relative to your script's location.
 . "$(dirname "$0")/common.sh"
 
-# Script must be run outside the chroot
+# Script must be run outside the chroot and as a regular user.
 assert_outside_chroot
+assert_not_root_user
 
 DEFAULT_PKGLIST="$SRC_ROOT/package_repo/package-list-dev.txt"
 
diff --git a/make_local_repo.sh b/make_local_repo.sh
index 7392916253..11e28bba3a 100755
--- a/make_local_repo.sh
+++ b/make_local_repo.sh
@@ -8,8 +8,9 @@
 # The path to common.sh should be relative to your script's location.
 . "$(dirname "$0")/common.sh"
 
-# Script must be run outside the chroot
+# Script must be run outside the chroot and as a regular user.
 assert_outside_chroot
+assert_not_root_user
 
 DEFAULT_DEST="$GCLIENT_ROOT/repo"
 DEFAULT_DEV_PKGLIST="$SRC_ROOT/package_repo/repo_list_dev.txt"