From df896ad40179c18dde99c3bafe498dabec43291f Mon Sep 17 00:00:00 2001
From: Ivan Kravets <me@ikravets.com>
Date: Thu, 20 Apr 2023 18:58:04 +0300
Subject: [PATCH] Fix normalizing path to unix // Resolve #4117

---
 platformio/fs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platformio/fs.py b/platformio/fs.py
index 107e6982..1f43a7a3 100644
--- a/platformio/fs.py
+++ b/platformio/fs.py
@@ -193,7 +193,7 @@ def match_src_files(src_dir, src_filter=None, src_exts=None, followlinks=True):
 def to_unix_path(path):
     if not IS_WINDOWS or not path:
         return path
-    return re.sub(r"[\\]+", "/", path)
+    return path.replace("\\", "/")
 
 
 def expanduser(path):