diff --git a/scripts/sign-iso.sh b/scripts/sign-iso.sh
index 3dde135..2d60037 100755
--- a/scripts/sign-iso.sh
+++ b/scripts/sign-iso.sh
@@ -38,7 +38,7 @@ sign_iso() {
                 info "created signature $sig_file"
             fi
         )
-        exit 0
+        return 0
     fi
 
     # ISO is already signed with developer keys - make sure .sig file exists
@@ -57,7 +57,7 @@ for iso_file in "${iso_files[@]}" ; do
     if [[ -L "$iso_file" ]] ; then
         iso_link_target="$(readlink "$iso_file")" || exit 1
         [[ -n "$iso_link_target" ]] || die "failed to read symlink $iso_file"
-        [[ ! "$iso_link_target" =~ ^/ ]] || die "$iso_file: link target must not include slashes"
+        [[ ! "$iso_link_target" =~ / ]] || die "$iso_file: link target must not include slashes"
         real_iso_file="$(dirname "$iso_file")/$iso_link_target"
         sign_iso "$real_iso_file"
         sig_file="${iso_file%.iso}.sig"