diff --git a/.ci/detach_plugin.sh b/.ci/detach_plugin.sh
index 6c9ea385f..a18cff9b9 100755
--- a/.ci/detach_plugin.sh
+++ b/.ci/detach_plugin.sh
@@ -46,8 +46,10 @@ main () {
             _detect autoload/SpaceVim/api/data/dict.vim
             _detect autoload/SpaceVim/api/data/list.vim
             _detect autoload/SpaceVim/api/data/json.vim
+            _detect autoload/SpaceVim/api/data/string.vim
             _detect autoload/SpaceVim/api/prompt.vim
             _detect autoload/SpaceVim/api/job.vim
+            _detect autoload/SpaceVim/api/vim.vim
             _detect autoload/SpaceVim/api/file.vim
             _detect autoload/SpaceVim/api/system.vim
             _detect autoload/SpaceVim/mapping/search.vim
diff --git a/autoload/SpaceVim/plugins/flygrep.vim b/autoload/SpaceVim/plugins/flygrep.vim
index 6aa3c0754..e3e1fc24b 100644
--- a/autoload/SpaceVim/plugins/flygrep.vim
+++ b/autoload/SpaceVim/plugins/flygrep.vim
@@ -14,7 +14,7 @@ let s:SYS = SpaceVim#api#import('system')
 let s:BUFFER = SpaceVim#api#import('vim#buffer')
 let s:LIST = SpaceVim#api#import('data#list')
 let s:REGEX = SpaceVim#api#import('vim#regex')
-
+let s:VIM = SpaceVim#api#import('vim')
 let s:LOGGER =SpaceVim#logger#derive('FlyGrep')
 let s:HI = SpaceVim#api#import('vim#highlight')
 if has('nvim')
@@ -860,7 +860,7 @@ function! SpaceVim#plugins#flygrep#open(argv) abort
   call s:matchadd('FileName', s:filename_pattern, 3)
   let s:MPT._prompt.begin = get(a:argv, 'input', '')
   let fs = get(a:argv, 'files', '')
-  if fs ==# '@buffers'
+  if !s:VIM.is_list(fs) && fs ==# '@buffers'
     let s:grep_files = map(s:BUFFER.listed_buffers(), 'bufname(v:val)')
   elseif !empty(fs)
     let s:grep_files = fs