diff --git a/kas/opt/Kconfig b/kas/opt/Kconfig
index 701bd263..e1476b8a 100644
--- a/kas/opt/Kconfig
+++ b/kas/opt/Kconfig
@@ -157,3 +157,16 @@ config KAS_INCLUDE_CACHE_DEB_SRC
 	string
 	default "kas/opt/cache-deb-src.yaml"
 	depends on CACHE_DEB_SRC
+
+
+config PREFETCH_BASE_APT
+	bool "Prefetch base-apt repo"
+	default y
+	help
+	  This makse Isar always take packages from base-apt repository where they
+	  are prefetched by debrepo script before requested.
+
+config KAS_INCLUDE_PREFETCH_BASE_APT
+	string
+	default "kas/opt/prefetch-base-apt.yaml"
+	depends on PREFETCH_BASE_APT
diff --git a/kas/opt/prefetch-base-apt.yaml b/kas/opt/prefetch-base-apt.yaml
new file mode 100644
index 00000000..0cbdb93f
--- /dev/null
+++ b/kas/opt/prefetch-base-apt.yaml
@@ -0,0 +1,9 @@
+# This software is a part of Isar.
+# Copyright (C) 2024 ilbers GmbH
+
+header:
+  version: 14
+
+local_conf_header:
+  prefetch-base-apt: |
+    ISAR_PREFETCH_BASE_APT = "1"