diff --git a/boards/sim/sim/sim/configs/thermal/defconfig b/boards/sim/sim/sim/configs/thermal/defconfig
index 4f26a749af..ef23e16089 100644
--- a/boards/sim/sim/sim/configs/thermal/defconfig
+++ b/boards/sim/sim/sim/configs/thermal/defconfig
@@ -1,75 +1,10 @@
-#
-# 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_NSH_CMDOPT_HEXDUMP is not set
-CONFIG_ARCH="sim"
-CONFIG_ARCH_BOARD="sim"
-CONFIG_ARCH_BOARD_SIM=y
-CONFIG_ARCH_CHIP="sim"
-CONFIG_ARCH_SIM=y
-CONFIG_BOARDCTL_APP_SYMTAB=y
-CONFIG_BOARDCTL_POWEROFF=y
-CONFIG_BOARD_LOOPSPERMSEC=0
-CONFIG_BOOT_RUNFROMEXTSRAM=y
-CONFIG_BUILTIN=y
+#include "../nsh/defconfig"
 CONFIG_DEBUG_FEATURES=y
-CONFIG_DEBUG_SYMBOLS=y
 CONFIG_DEBUG_THERMAL=y
 CONFIG_DEBUG_THERMAL_ERROR=y
 CONFIG_DEBUG_THERMAL_INFO=y
 CONFIG_DEBUG_THERMAL_WARN=y
-CONFIG_DEV_GPIO=y
-CONFIG_DEV_LOOP=y
-CONFIG_DEV_ZERO=y
-CONFIG_ETC_FATDEVNO=2
-CONFIG_ETC_ROMFS=y
-CONFIG_ETC_ROMFSDEVNO=1
-CONFIG_EXAMPLES_GPIO=y
-CONFIG_EXAMPLES_HELLO=y
-CONFIG_FAT_LCNAMES=y
-CONFIG_FAT_LFN=y
-CONFIG_FSUTILS_PASSWD=y
-CONFIG_FSUTILS_PASSWD_READONLY=y
-CONFIG_FS_BINFS=y
-CONFIG_FS_FAT=y
-CONFIG_FS_PROCFS=y
-CONFIG_FS_RAMMAP=y
-CONFIG_FS_ROMFS=y
-CONFIG_GPIO_LOWER_HALF=y
-CONFIG_IDLETHREAD_STACKSIZE=4096
-CONFIG_INIT_ENTRYPOINT="nsh_main"
-CONFIG_IOEXPANDER=y
-CONFIG_IOEXPANDER_DUMMY=y
-CONFIG_LIBC_ENVPATH=y
-CONFIG_LIBC_EXECFUNCS=y
-CONFIG_LIBC_LOCALE=y
-CONFIG_LIBC_LOCALE_CATALOG=y
-CONFIG_LIBC_LOCALE_GETTEXT=y
-CONFIG_LIBC_MAX_EXITFUNS=1
-CONFIG_LIBC_NUMBERED_ARGS=y
-CONFIG_NSH_ARCHINIT=y
-CONFIG_NSH_BUILTIN_APPS=y
-CONFIG_NSH_FILE_APPS=y
-CONFIG_NSH_MOTD=y
-CONFIG_NSH_MOTD_STRING="MOTD: username=admin password=Administrator"
-CONFIG_NSH_READLINE=y
-CONFIG_PATH_INITIAL="/bin"
 CONFIG_PM=y
-CONFIG_PSEUDOFS_ATTRIBUTES=y
-CONFIG_PSEUDOFS_SOFTLINKS=y
-CONFIG_READLINE_TABCOMPLETION=y
-CONFIG_SCHED_BACKTRACE=y
-CONFIG_SCHED_HAVE_PARENT=y
-CONFIG_SCHED_WAITPID=y
-CONFIG_SIM_WALLTIME_SIGNAL=y
-CONFIG_START_MONTH=6
-CONFIG_START_YEAR=2008
-CONFIG_SYSTEM_DUMPSTACK=y
-CONFIG_SYSTEM_NSH=y
 CONFIG_THERMAL=y
 CONFIG_THERMAL_DUMMY=y
 CONFIG_THERMAL_PROCFS=y