diff --git a/lua/fzf-lua/init.lua b/lua/fzf-lua/init.lua
index 1975f0f..d60c155 100644
--- a/lua/fzf-lua/init.lua
+++ b/lua/fzf-lua/init.lua
@@ -187,7 +187,14 @@ function M.setup(opts)
   -- reset default window opts if set by user
   fzf.default_window_options = config.winopts()
   -- set the fzf binary if set by the user
-  if config.fzf_bin then fzf.fzf_binary = config.fzf_bin end
+  if config.fzf_bin then
+    if fzf.default_options ~= nil and
+      vim.fn.executable(config.fzf_bin) == 1 then
+      fzf.default_options.fzf_binary = config.fzf_bin
+    else
+      config.fzf_bin = nil
+    end
+  end
 end
 
 -- we usually send winopts with every fzf.fzf call
diff --git a/lua/fzf-lua/providers/helptags.lua b/lua/fzf-lua/providers/helptags.lua
index 3a78028..5738fe3 100644
--- a/lua/fzf-lua/providers/helptags.lua
+++ b/lua/fzf-lua/providers/helptags.lua
@@ -87,7 +87,8 @@ local fzf_function = function (cb)
         end
       end
     end
-    -- done
+    -- done, we can't call utils.delayed_cb here
+    -- because sleep() messes up the coroutine
     cb(nil, function() end)
   end)()
 end
diff --git a/lua/fzf-lua/providers/lsp.lua b/lua/fzf-lua/providers/lsp.lua
index 0709678..39aba0b 100644
--- a/lua/fzf-lua/providers/lsp.lua
+++ b/lua/fzf-lua/providers/lsp.lua
@@ -144,10 +144,7 @@ local function set_lsp_fzf_fn(opts)
         opts.lsp_handler.handler(opts, cb, co, result)
         -- close the pipe to fzf, this
         -- removes the loading indicator in fzf
-        -- HACK: slight delay to prevent missing results
-        -- otherwise the input stream closes too fast
-        vim.cmd("sleep! 10m")
-        cb(nil, function() end)
+        utils.delayed_cb(cb)
         return
       end
 
@@ -407,8 +404,7 @@ M.diagnostics = function(opts)
       -- coroutine.yield()
       -- close the pipe to fzf, this
       -- removes the loading indicator in fzf
-        vim.cmd("sleep! 10m")
-      cb(nil, function() end)
+      utils.delayed_cb(cb)
     end)()
   end
 
diff --git a/lua/fzf-lua/providers/oldfiles.lua b/lua/fzf-lua/providers/oldfiles.lua
index 3e32aec..0ae9384 100644
--- a/lua/fzf-lua/providers/oldfiles.lua
+++ b/lua/fzf-lua/providers/oldfiles.lua
@@ -59,7 +59,7 @@ M.oldfiles = function(opts)
           cb(nil, function() end)
       end)
     end
-    cb(nil, function() end)
+    utils.delayed_cb(cb)
   end
 
   --[[ opts.cb_selected = function(_, x)
diff --git a/lua/fzf-lua/providers/quickfix.lua b/lua/fzf-lua/providers/quickfix.lua
index 52f5b3e..80a73e0 100644
--- a/lua/fzf-lua/providers/quickfix.lua
+++ b/lua/fzf-lua/providers/quickfix.lua
@@ -36,7 +36,7 @@ local quickfix_run = function(opts, cfg, locations)
           cb(nil, function() end)
       end)
     end
-    cb(nil, function() end)
+    utils.delayed_cb(cb)
   end
 
   --[[ opts.cb_selected = function(_, x)
diff --git a/lua/fzf-lua/utils.lua b/lua/fzf-lua/utils.lua
index 7e1512e..4bd58b9 100644
--- a/lua/fzf-lua/utils.lua
+++ b/lua/fzf-lua/utils.lua
@@ -193,4 +193,11 @@ function M.send_ctrl_c()
     vim.api.nvim_replace_termcodes("<C-c>", true, false, true), 'n', true)
 end
 
+function M.delayed_cb(cb)
+  -- HACK: slight delay to prevent missing results
+  -- otherwise the input stream closes too fast
+  vim.cmd("sleep! 10m")
+  cb(nil, function() end)
+end
+
 return M