diff --git a/developer/bin/list_apps_in_pkg b/developer/bin/list_apps_in_pkg
index 99e2185eed..3d975eecf7 100755
--- a/developer/bin/list_apps_in_pkg
+++ b/developer/bin/list_apps_in_pkg
@@ -138,7 +138,7 @@ _list_apps_in_pkg () {
     if [[ -d "$opt_pkg" ]]; then
         pkgdir="$opt_pkg"
     else
-        local tmpdir=`/usr/bin/mktemp -d -t list_ids_in_pkg`
+        local tmpdir="$(usr/bin/mktemp -d -t list_ids_in_pkg)"
         trap "/bin/rm -rf -- '$tmpdir'" EXIT
         pkgdir="$tmpdir/unpack"
         /usr/sbin/pkgutil --expand "$opt_pkg" "$tmpdir/unpack" "$pkgdir"
diff --git a/developer/bin/list_ids_in_pkg b/developer/bin/list_ids_in_pkg
index 4633150b74..c9c3594038 100755
--- a/developer/bin/list_ids_in_pkg
+++ b/developer/bin/list_ids_in_pkg
@@ -64,7 +64,7 @@ _list_ids_in_pkg () {
             pkgdir="$(/usr/bin/readlink "$pkgdir")"
         fi
     else
-        local tmpdir=`/usr/bin/mktemp -d -t list_ids_in_pkg`
+        local tmpdir="$(/usr/bin/mktemp -d -t list_ids_in_pkg)"
         trap "/bin/rm -rf -- '$tmpdir'" EXIT
         pkgdir="$tmpdir/unpack"
         /usr/sbin/pkgutil --expand "$1" "$tmpdir/unpack" "$pkgdir"