diff --git a/lua/lazy/core/loader.lua b/lua/lazy/core/loader.lua
index c510d69..60ea915 100644
--- a/lua/lazy/core/loader.lua
+++ b/lua/lazy/core/loader.lua
@@ -166,17 +166,24 @@ end
 ---@param ... string
 function M.source_runtime(...)
   local dir = table.concat({ ... }, "/")
+  ---@type string[]
+  local files = {}
   Util.walk(dir, function(path, name, t)
     local ext = name:sub(-3)
     name = name:sub(1, -5)
     if t == "file" and (ext == "lua" or ext == "vim") and not M.disabled_rtp_plugins[name] then
-      Util.track({ runtime = path })
-      Util.try(function()
-        vim.cmd("silent source " .. path)
-      end, "Failed to source `" .. path .. "`")
-      Util.track()
+      files[#files + 1] = path
     end
   end)
+  -- plugin files are sourced alphabetically per directory
+  table.sort(files)
+  for _, path in ipairs(files) do
+    Util.track({ runtime = path })
+    Util.try(function()
+      vim.cmd("silent source " .. path)
+    end, "Failed to source `" .. path .. "`")
+    Util.track()
+  end
 end
 
 -- This loader is added as the very last one.