patch 8.1.0539: cannot build without the sandbox commit https://github.com/vim/vim/commit/82e8c92ebef5afcac0c0fdb706ff163f9b3366f7 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Nov 20 13:32:36 2018 +0100 patch 8.1.0539: cannot build without the sandbox Problem: Cannot build without the sandbox. Solution: Set the secure option instead of using the sandbox. Also restrict the characters from 'spelllang' that are used for LANG.vim. (suggested by Yasuhiro Matsumoto)

--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    539,
+/**/
     538,
 /**/
     537,