diff --git a/builder/frameworks/espidf.py b/builder/frameworks/espidf.py
index c2b41ff..9b05452 100644
--- a/builder/frameworks/espidf.py
+++ b/builder/frameworks/espidf.py
@@ -79,6 +79,10 @@ BUILD_DIR = env.subst("$BUILD_DIR")
 PROJECT_DIR = env.subst("$PROJECT_DIR")
 PROJECT_SRC_DIR = env.subst("$PROJECT_SRC_DIR")
 CMAKE_API_REPLY_PATH = os.path.join(".cmake", "api", "v1", "reply")
+SDKCONFIG_PATH = board.get(
+    "build.esp-idf.sdkconfig_path",
+    os.path.join(PROJECT_DIR, "sdkconfig.%s" % env.subst("$PIOENV")),
+)
 
 
 def get_project_lib_includes(env):
@@ -105,7 +109,6 @@ def is_cmake_reconfigure_required(cmake_api_reply_dir):
         os.path.join(PROJECT_SRC_DIR, "CMakeLists.txt"),
     ]
     cmake_preconf_dir = os.path.join(BUILD_DIR, "config")
-    sdkconfig = os.path.join(PROJECT_DIR, "sdkconfig")
 
     for d in (cmake_api_reply_dir, cmake_preconf_dir):
         if not os.path.isdir(d) or not os.listdir(d):
@@ -114,9 +117,9 @@ def is_cmake_reconfigure_required(cmake_api_reply_dir):
         return True
     if not os.path.isfile(os.path.join(BUILD_DIR, "build.ninja")):
         return True
-    if os.path.isfile(sdkconfig) and os.path.getmtime(sdkconfig) > os.path.getmtime(
-        cmake_cache_file
-    ):
+    if os.path.isfile(SDKCONFIG_PATH) and os.path.getmtime(
+        SDKCONFIG_PATH
+    ) > os.path.getmtime(cmake_cache_file):
         return True
     if any(
         os.path.getmtime(f) > os.path.getmtime(cmake_cache_file)
@@ -501,7 +504,7 @@ def generate_project_ld_script(sdk_config, ignore_targets=None):
 
     args = {
         "script": os.path.join(FRAMEWORK_DIR, "tools", "ldgen", "ldgen.py"),
-        "config": os.path.join(PROJECT_DIR, "sdkconfig"),
+        "config": SDKCONFIG_PATH,
         "fragments": " ".join(['"%s"' % f for f in project_files.get("lf_files")]),
         "kconfig": os.path.join(FRAMEWORK_DIR, "Kconfig"),
         "env_file": os.path.join("$BUILD_DIR", "config.env"),
@@ -699,7 +702,7 @@ def build_bootloader():
             "-DPYTHON_DEPS_CHECKED=1",
             "-DPYTHON=" + env.subst("$PYTHONEXE"),
             "-DIDF_PATH=" + FRAMEWORK_DIR,
-            "-DSDKCONFIG=" + os.path.join(PROJECT_DIR, "sdkconfig"),
+            "-DSDKCONFIG=" + SDKCONFIG_PATH,
             "-DLEGACY_INCLUDE_COMMON_HEADERS=",
             "-DEXTRA_COMPONENT_DIRS="
             + os.path.join(FRAMEWORK_DIR, "components", "bootloader"),
@@ -1147,10 +1150,16 @@ project_codemodel = get_cmake_code_model(
         "-DPYTHON_DEPS_CHECKED=1",
         "-DEXTRA_COMPONENT_DIRS:PATH=" + ";".join(extra_components),
         "-DPYTHON=" + env.subst("$PYTHONEXE"),
+        "-DSDKCONFIG=" + SDKCONFIG_PATH,
     ]
     + click.parser.split_arg_string(board.get("build.cmake_extra_args", "")),
 )
 
+# At this point the sdkconfig file should be generated by the underlying build system
+assert os.path.isfile(SDKCONFIG_PATH), (
+    "Missing auto-generated SDK configuration file `%s`" % SDKCONFIG_PATH
+)
+
 if not project_codemodel:
     sys.stderr.write("Error: Couldn't find code model generated by CMake\n")
     env.Exit(1)