 class Builder
 
   constructor: () ->
-    @id      = uuid.v4()
-    @spawner = require("spawner").init()
-    @storage = require("storage").init()
+    @id         = uuid.v4()
+    @request_id = @id
+    @spawner    = require("spawner").init()
+    @storage    = require("storage").init()
 
   build: (source, options, cb) ->
     ext = if options.type is "deb" then "deb" else "tgz"

      res.writeHead 200
        "Content-Type":      "text/plain"
        "Transfer-Encoding": "chunked"
        "X-Cache-Url":       builder.cache_url
        "X-Manifest-Id":     builder.id
        "X-Slug-Url":        builder.slug_url(req.body.type)

          NODE_ENV:      process.env.NODE_ENV
          NODE_PATH:     process.env.NODE_PATH
          PATH:          process.env.PATH
          REQUEST_ID:    @request_id
          SLUG_ID:       @id
          SLUG_URL:      @slug_url(options.type)
          SLUG_PUT_URL:  slug_put_url
