change to git-show for condition check

fixup: 0a6a4d0 Use exit status rather than string emptiness
- git-ls always returns 0 as exit status, so it can't be used
  as a check. git-show does return an error status.

1 files changed, 1 insertions, 1 deletions

diff --git a/package.inc.sh b/package.inc.sh
index 66a83c6..360e41f 100644
--- a/package.inc.sh
+++ b/package.inc.sh
@@ -135,7 +135,7 @@ package_export() {
     subtree=repos/$repo-$OPT_ARCH
   fi
 
-  if ! git ls-tree "remotes/$remote/packages/$pkgname" "$subtree/" &>/dev/null; then
+  if ! git show "remotes/$remote/packages/$pkgname:$subtree/" &>/dev/null; then
     if [[ $repo ]]; then
       log_error "package '%s' not found in repo '%s-%s'" "$pkgname" "$repo" "$OPT_ARCH"
       return 1