diff --git a/project.py b/project.py
index ae2bf6f..8a38c58 100755
--- a/project.py
+++ b/project.py
@@ -2217,13 +2217,17 @@
         cmd += ['--continue-at', '%d' % (size,)]
       else:
         platform_utils.remove(tmpPath)
-    if 'http_proxy' in os.environ and 'darwin' == sys.platform:
-      cmd += ['--proxy', os.environ['http_proxy']]
-    with GetUrlCookieFile(srcUrl, quiet) as (cookiefile, _proxy):
+    with GetUrlCookieFile(srcUrl, quiet) as (cookiefile, proxy):
       if cookiefile:
         cmd += ['--cookie', cookiefile, '--cookie-jar', cookiefile]
-      if srcUrl.startswith('persistent-'):
-        srcUrl = srcUrl[len('persistent-'):]
+      if proxy:
+        cmd += ['--proxy', proxy]
+      elif 'http_proxy' in os.environ and 'darwin' == sys.platform:
+        cmd += ['--proxy', os.environ['http_proxy']]
+      if srcUrl.startswith('persistent-https'):
+        srcUrl = 'http' + srcUrl[len('persistent-https'):]
+      elif srcUrl.startswith('persistent-http'):
+        srcUrl = 'http' + srcUrl[len('persistent-http'):]
       cmd += [srcUrl]
 
       if IsTrace():