diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index de799b5..6c5bace 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -13,6 +13,7 @@
 CONFIG_FIT_RSASSA_PSS=y
 CONFIG_FIT_CIPHER=y
 CONFIG_FIT_VERBOSE=y
+CONFIG_LEGACY_IMAGE_FORMAT=y
 CONFIG_BOOTSTAGE=y
 CONFIG_BOOTSTAGE_REPORT=y
 CONFIG_BOOTSTAGE_FDT=y
@@ -72,6 +73,7 @@
 CONFIG_CMD_I2C=y
 CONFIG_CMD_LOADM=y
 CONFIG_CMD_LSBLK=y
+CONFIG_CMD_MMC=y
 CONFIG_CMD_MUX=y
 CONFIG_CMD_OSD=y
 CONFIG_CMD_PCI=y