diff --git i/tools/ldgen/ldgen/sdkconfig.py w/tools/ldgen/ldgen/sdkconfig.py
index 7899ae5f91..a9994d6b8d 100644
--- i/tools/ldgen/ldgen/sdkconfig.py
+++ w/tools/ldgen/ldgen/sdkconfig.py
@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 
-import kconfiglib
+import espkconfiglib
 
 
 class SDKConfig:
@@ -11,7 +11,7 @@ class SDKConfig:
     Evaluates conditional expressions based on the build's sdkconfig and Kconfig files.
     """
     def __init__(self, kconfig_file, sdkconfig_file):
-        self.config = kconfiglib.Kconfig(kconfig_file)
+        self.config = espkconfiglib.Kconfig(kconfig_file)
         self.config.load_config(sdkconfig_file)
         self.config.warn = False  # eval_string may contain un-declared symbol