diff --git a/lua/lazy/async.lua b/lua/lazy/async.lua
index 8a0a798..9f39a5c 100644
--- a/lua/lazy/async.lua
+++ b/lua/lazy/async.lua
@@ -37,6 +37,7 @@ function Async:sleep(ms)
   vim.defer_fn(function()
     self.sleeping = false
   end, ms)
+  coroutine.yield()
 end
 
 function Async:suspend()
diff --git a/lua/lazy/manage/process.lua b/lua/lazy/manage/process.lua
index 7c568cb..03becf2 100644
--- a/lua/lazy/manage/process.lua
+++ b/lua/lazy/manage/process.lua
@@ -197,7 +197,21 @@ function M.exec(cmd, opts)
       lines = _lines
     end,
   })
-  vim.fn.jobwait({ job })
+
+  if job <= 0 then
+    error("Failed to start job: " .. vim.inspect(cmd))
+  end
+
+  local Async = require("lazy.async")
+  local async = Async.current
+  if async then
+    while vim.fn.jobwait({ job }, 0)[1] == -1 do
+      async:sleep(10)
+    end
+  else
+    vim.fn.jobwait({ job })
+  end
+
   return lines
 end
 
diff --git a/lua/lazy/manage/task/init.lua b/lua/lazy/manage/task/init.lua
index a142cf4..989f362 100644
--- a/lua/lazy/manage/task/init.lua
+++ b/lua/lazy/manage/task/init.lua
@@ -217,16 +217,13 @@ function Task:spawn(cmd, opts)
   self._running:suspend()
 
   local running = true
-  local ret = true
+  local ret = { ok = true, output = "" }
   ---@param output string
   function opts.on_exit(ok, output)
     if not headless then
       self:log(vim.trim(output), ok and vim.log.levels.DEBUG or vim.log.levels.ERROR)
     end
-    if on_exit then
-      pcall(on_exit, ok, output)
-    end
-    ret = ok
+    ret = { ok = ok, output = output }
     running = false
     self._running:resume()
   end
@@ -241,7 +238,11 @@ function Task:spawn(cmd, opts)
   Process.spawn(cmd, opts)
   coroutine.yield()
   assert(not running, "process still running?")
-  return ret
+  if on_exit then
+    pcall(on_exit, ret.ok, ret.output)
+  end
+  coroutine.yield()
+  return ret.ok
 end
 
 function Task:prefix()