diff --git a/.gitignore b/.gitignore
index 3a9d027..91b0b3f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,7 @@ build/cbfs.rom
 build/root/*
 build/*iso
 build/daemon
+build/kernel_config.old
 build/.*
 src/.*
 Makefile
diff --git a/build/Makefile.am b/build/Makefile.am
index 07b6db6..205037c 100644
--- a/build/Makefile.am
+++ b/build/Makefile.am
@@ -15,3 +15,5 @@ kernel-local:
 	hyperctl build -t hyperstart-dev:latest .
 	hyperctl run --rm hyperstart-dev:latest cat /root/build/result/kernel >kernel.new && mv -f kernel.new kernel
 	hyperctl run --rm hyperstart-dev:latest cat /root/build/result/modules.tar >modules.tar
+	mv kernel_config kernel_config.old
+	hyperctl run --rm hyperstart-dev:latest cat /root/build/result/kernel_config >kernel_config