diff --git a/README.md b/README.md
index 6d1b4d4..acf3f35 100644
--- a/README.md
+++ b/README.md
@@ -11,5 +11,5 @@ Warning: `leaf` won't deal with the dependence relation, and currently won't che
 - We won't install Grub in LFS. Install in BLFS with UEFI instead.
 
 ## issues
-- `lfs/vim-9.1.1166` has `Test_write_backup_symlink` failed, which can pass if `call assert_true(filereadable('./Xbackup/Xwbsfile.bak'))
-` is commented. Seams like cannot create this backup file.
+- `lfs/vim-9.1.x` has `Test_write_backup_symlink` failed, which can pass if `call assert_true(filereadable('./Xbackup/Xwbsfile.bak'))` is commented. ~~Seams like cannot create this backup file.~~ This is because building in `/tmp`. It's safe to ignore.
+