diff --git a/configs/netbox_os_byron_defconfig.m4 b/configs/netbox_os_byron_defconfig.m4
index 3c59bbb..b19c242 100644
--- a/configs/netbox_os_byron_defconfig.m4
+++ b/configs/netbox_os_byron_defconfig.m4
@@ -8,5 +8,3 @@ BR2_LINUX_KERNEL_INTREE_DTS_NAME="versatile-pb"
 dnl Build FIT image for U-Boot, useful on all Byron builds
 NETBOX_IMAGE_FIT=y
 
-NETBOX_PLAT_byron=y
-
diff --git a/configs/netbox_os_coronet_defconfig.m4 b/configs/netbox_os_coronet_defconfig.m4
index e9bf598..2c37dd7 100644
--- a/configs/netbox_os_coronet_defconfig.m4
+++ b/configs/netbox_os_coronet_defconfig.m4
@@ -6,3 +6,6 @@ dnl Linux insists on building an uImage as part of "make all",
 dnl which requires mkimage.
 BR2_PACKAGE_HOST_UBOOT_TOOLS=y
 BR2_LINUX_KERNEL_ZIMAGE=y
+
+dnl Build FIT image for U-Boot, useful on all Envoy builds
+NETBOX_IMAGE_FIT=y
diff --git a/configs/netbox_os_dagger_defconfig.m4 b/configs/netbox_os_dagger_defconfig.m4
index 241f917..6b84ad8 100644
--- a/configs/netbox_os_dagger_defconfig.m4
+++ b/configs/netbox_os_dagger_defconfig.m4
@@ -7,3 +7,6 @@ dnl Linux insists on building an uImage as part of "make all",
 dnl which requires mkimage.
 BR2_PACKAGE_HOST_UBOOT_TOOLS=y
 BR2_LINUX_KERNEL_ZIMAGE=y
+
+dnl Build FIT image for U-Boot, useful on all Envoy builds
+NETBOX_IMAGE_FIT=y