diff --git a/kernel.spec b/kernel.spec
index 3f2aeef..df292b2 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -61,6 +61,9 @@
 # but also add public keys of private ROSA's keys
 %bcond_without additional_keys
 
+# Fail the build after "make oldconfig" to edit kernel configs
+%bcond_with fail
+
 # User Mode Linux, https://habr.com/ru/company/itsumma/blog/459558/
 # Not buildable on aarch64
 %ifarch %{x86_64}
@@ -1008,7 +1011,12 @@ CONFIG_DIR=arch/%{arch_type}/configs
 mkdir -p "${CONFIG_DIR}"
 
 cfg_file=arch/%{arch_type}/configs/%{arch_suffix}_defconfig-%{flavour}
-make ARCH=%{arch_type} oldconfig && \
+
+make ARCH=%{arch_type} oldconfig
+# When it is needed to edit kernel configs, run:
+# rpmbuild --rebuild --with=fail kernel*.src.rpm
+# and then work with the config in the buildroot with applied patches etc.
+%{?_with_fail:exit 1}
 mv .config ${cfg_file}
 echo "Created ${cfg_file}."