diff --git a/Kconfig b/Kconfig
index 8953fbad..66dd4112 100644
--- a/Kconfig
+++ b/Kconfig
@@ -14,7 +14,7 @@ config KAS_INCLUDE_MAIN
 
 config KAS_BUILD_SYSTEM
 	string
-	default "isar-privileged"
+	default "isar-rootless"
 
 source "kas/machine/Kconfig"
 source "kas/distro/Kconfig"
diff --git a/kas/isar.yaml b/kas/isar.yaml
index a5194fc8..7522aff2 100644
--- a/kas/isar.yaml
+++ b/kas/isar.yaml
@@ -4,7 +4,7 @@
 header:
   version: 23
 
-build_system: isar-privileged
+build_system: isar-rootless
 
 repos:
   isar: