From aa5beb4f1a207659f9fb0b0952e6a01513237fca Mon Sep 17 00:00:00 2001
From: Fredrik Kling <1664069+gnilk@users.noreply.github.com>
Date: Mon, 27 Feb 2023 11:37:17 +0100
Subject: [PATCH] Expand OS vars in build.esp-idf.sdkconfig_path (#995)

---
 builder/frameworks/espidf.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/builder/frameworks/espidf.py b/builder/frameworks/espidf.py
index fed7865..47f44b1 100644
--- a/builder/frameworks/espidf.py
+++ b/builder/frameworks/espidf.py
@@ -84,10 +84,10 @@ BUILD_DIR = env.subst("$BUILD_DIR")
 PROJECT_DIR = env.subst("$PROJECT_DIR")
 PROJECT_SRC_DIR = env.subst("$PROJECT_SRC_DIR")
 CMAKE_API_REPLY_PATH = os.path.join(".cmake", "api", "v1", "reply")
-SDKCONFIG_PATH = board.get(
+SDKCONFIG_PATH =  os.path.expandvars(board.get(
     "build.esp-idf.sdkconfig_path",
     os.path.join(PROJECT_DIR, "sdkconfig.%s" % env.subst("$PIOENV")),
-)
+))
 
 
 def get_project_lib_includes(env):