diff --git a/configs/spresense/mpy/defconfig b/configs/spresense/mpy/defconfig
new file mode 100644
index 0000000000..74dc689357
--- /dev/null
+++ b/configs/spresense/mpy/defconfig
@@ -0,0 +1,87 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_CXD56_I2C0_SCUSEQ is not set
+# CONFIG_MMCSD_HAVE_WRITEPROTECT is not set
+# CONFIG_MMCSD_SPI is not set
+# CONFIG_STANDARD_SERIAL is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="spresense"
+CONFIG_ARCH_BOARD_SPRESENSE=y
+CONFIG_ARCH_CHIP_CXD56XX=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_ARMV7M_USEBASEPRI=y
+CONFIG_BOARD_LOOPSPERMSEC=5434
+CONFIG_BOOT_RUNFROMISRAM=y
+CONFIG_BUILTIN=y
+CONFIG_CLOCK_MONOTONIC=y
+CONFIG_CXD56_ADC=y
+CONFIG_CXD56_CISIF=y
+CONFIG_CXD56_HPADC0=y
+CONFIG_CXD56_HPADC1=y
+CONFIG_CXD56_I2C0=y
+CONFIG_CXD56_I2C2=y
+CONFIG_CXD56_I2C=y
+CONFIG_CXD56_LPADC=y
+CONFIG_CXD56_PWM0=y
+CONFIG_CXD56_PWM1=y
+CONFIG_CXD56_PWM2=y
+CONFIG_CXD56_PWM3=y
+CONFIG_CXD56_PWM=y
+CONFIG_CXD56_SDIO=y
+CONFIG_CXD56_SPI4=y
+CONFIG_CXD56_SPI5=y
+CONFIG_CXD56_SPI=y
+CONFIG_CXD56_UART2=y
+CONFIG_CXD56_USBDEV=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_FAT_LCNAMES=y
+CONFIG_FAT_LFN=y
+CONFIG_FAT_MAXFNAME=64
+CONFIG_FS_FAT=y
+CONFIG_FS_PROCFS=y
+CONFIG_FS_PROCFS_REGISTER=y
+CONFIG_HAVE_CXX=y
+CONFIG_HAVE_CXXINITIALIZE=y
+CONFIG_I2C=y
+CONFIG_MAX_TASKS=16
+CONFIG_MAX_WDOGPARMS=2
+CONFIG_MMCSD=y
+CONFIG_MMCSD_SDIO=y
+CONFIG_NFILE_DESCRIPTORS=8
+CONFIG_NFILE_STREAMS=8
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_READLINE=y
+CONFIG_PREALLOC_MQ_MSGS=4
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_PREALLOC_WDOGS=16
+CONFIG_RAM_SIZE=1572864
+CONFIG_RAM_START=0x0d000000
+CONFIG_READLINE_CMD_HISTORY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_RTC=y
+CONFIG_RTC_DRIVER=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_SPI=y
+CONFIG_START_DAY=6
+CONFIG_START_MONTH=12
+CONFIG_START_YEAR=2011
+CONFIG_SYSTEM_CLE=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_SYSTEM_NSH_CXXINITIALIZE=y
+CONFIG_SYSTEM_USBMSC=y
+CONFIG_UART1_SERIAL_CONSOLE=y
+CONFIG_USBDEV=y
+CONFIG_USBDEV_DMA=y
+CONFIG_USBDEV_DUALSPEED=y
+CONFIG_USBMSC=y
+CONFIG_USBMSC_EPBULKIN=1
+CONFIG_USBMSC_REMOVABLE=y
+CONFIG_USER_ENTRYPOINT="nsh_main"