diff --git a/boards/sim/sim/sim/configs/zig/defconfig b/boards/sim/sim/sim/configs/zig/defconfig
new file mode 100644
index 0000000000..6463ef6f50
--- /dev/null
+++ b/boards/sim/sim/sim/configs/zig/defconfig
@@ -0,0 +1,66 @@
+#
+# 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
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DEV_GPIO=y
+CONFIG_DEV_LOOP=y
+CONFIG_DEV_ZERO=y
+CONFIG_EXAMPLES_GPIO=y
+CONFIG_EXAMPLES_HELLO_ZIG=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_NSH_ARCHINIT=y
+CONFIG_NSH_ARCHROMFS=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_CONSOLE_LOGIN=y
+CONFIG_NSH_FATDEVNO=2
+CONFIG_NSH_FILE_APPS=y
+CONFIG_NSH_MOTD=y
+CONFIG_NSH_MOTD_STRING="MOTD: username=admin password=Administrator"
+CONFIG_NSH_READLINE=y
+CONFIG_NSH_ROMFSDEVNO=1
+CONFIG_NSH_ROMFSETC=y
+CONFIG_PATH_INITIAL="/bin"
+CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=2048
+CONFIG_PSEUDOFS_ATTRIBUTES=y
+CONFIG_PSEUDOFS_SOFTLINKS=y
+CONFIG_READLINE_TABCOMPLETION=y
+CONFIG_SCHED_HAVE_PARENT=y
+CONFIG_SCHED_HPWORK=y
+CONFIG_SCHED_ONEXIT=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_MONTH=6
+CONFIG_START_YEAR=2008
+CONFIG_SYSTEM_NSH=y
diff --git a/boards/sim/sim/sim/scripts/Make.defs b/boards/sim/sim/sim/scripts/Make.defs
index 897dd22bcf..0c58529c86 100644
--- a/boards/sim/sim/sim/scripts/Make.defs
+++ b/boards/sim/sim/sim/scripts/Make.defs
@@ -103,6 +103,9 @@ NM = $(CROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
 RUSTC = rustc --edition 2021
+ZIG = zig
+ZCC = zig cc
+ZCXX = zig c++
 
 CFLAGS := $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
    $(ARCHCFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) -pipe
diff --git a/tools/Config.mk b/tools/Config.mk
index 48aa2b3fb0..f8cd1b1625 100644
--- a/tools/Config.mk
+++ b/tools/Config.mk
@@ -312,6 +312,24 @@ define COMPILERUST
 	$(Q) $(RUSTC) --emit obj $(RUSTFLAGS) $($(strip $1)_RUSTFLAGS) $1 -o $2
 endef
 
+# COMPILEZIG - Default macro to compile one Zig file
+# Example: $(call COMPILEZIG, in-file, out-file)
+#
+# Depends on these settings defined in board-specific Make.defs file
+# installed at $(TOPDIR)/Make.defs:
+#
+#   ZIG - The command to invoke the Zig compiler
+#   ZIGFLAGS - Options to pass to the Zig compiler
+#
+# '<filename>.zig_ZIGFLAGS += <options>' may also be used, as an example, to
+# change the options used with the single file <filename>.zig. The same
+# applies mutatis mutandis.
+
+define COMPILEZIG
+	@echo "ZIG: $1"
+	$(Q) $(ZIG) build-obj $(ZIGFLAGS) $($(strip $1)_ZIGFLAGS) $1 --name $2
+endef
+
 # ASSEMBLE - Default macro to assemble one assembly language file
 # Example: $(call ASSEMBLE, in-file, out-file)
 #
diff --git a/tools/ci/cibuild.sh b/tools/ci/cibuild.sh
index 1e720078c4..838f1959de 100755
--- a/tools/ci/cibuild.sh
+++ b/tools/ci/cibuild.sh
@@ -381,6 +381,24 @@ function rust {
   fi
 }
 
+function zig {
+  mkdir -p "${prebuilt}"/zig
+  add_path "${prebuilt}"/zig
+
+  if ! type zig &> /dev/null; then
+    case ${os} in
+      Darwin)
+        brew install zig
+        ;;
+      Linux)
+        # Currently Debian don't install zig (only built)
+        export ZIG_HOME=${prebuilt}/zig
+        curl -sL https://ziglang.org/download/0.9.1/zig-linux-x86_64-0.9.1.tar.xz | tar -xJC "${prebuilt}"/zig --strip-components=1
+	;;
+    esac
+  fi
+}
+
 function usage {
   echo ""
   echo "USAGE: $0 [-i] [-s] [-c] [-*] <testlist>"
diff --git a/tools/ci/docker/linux/Dockerfile b/tools/ci/docker/linux/Dockerfile
index 7e26869875..8838dee399 100644
--- a/tools/ci/docker/linux/Dockerfile
+++ b/tools/ci/docker/linux/Dockerfile
@@ -34,6 +34,7 @@ RUN apt-get update -qq && DEBIAN_FRONTEND="noninteractive" apt-get install -y -q
   cmake \
   g++ \
   gawk \
+  jq \
   git
 
 RUN mkdir /tools
@@ -68,6 +69,12 @@ RUN mkdir -p $CARGO_HOME \
   && $CARGO_HOME/bin/rustup target add thumbv6m-none-eabi \
   && $CARGO_HOME/bin/rustup target add thumbv7m-none-eabi
 
+# Install Zig from NuttX
+ENV ZIG_HOME=/tools/zig
+
+RUN mkdir -p $ZIG_HOME \
+  && curl -sL https://ziglang.org/download/0.9.1/zig-linux-x86_64-0.9.1.tar.xz | tar -xJC $ZIG_HOME --strip-components=1 
+
 CMD [ "/bin/bash" ]
 
 ###############################################################################
@@ -269,6 +276,10 @@ ENV CARGO_HOME=/tools/rust/cargo
 ENV RUSTUP_HOME=/tools/rust/rustup
 ENV PATH="/tools/rust/cargo/bin:$PATH"
 
+# Zig toolchain
+COPY --from=nuttx-tools /tools/zig/ /tools/zig/
+ENV PATH="/tools/zig:$PATH"
+
 # ARM toolchain
 COPY --from=nuttx-toolchain-arm /tools/gcc-arm-none-eabi/ gcc-arm-none-eabi/
 ENV PATH="/tools/gcc-arm-none-eabi/bin:$PATH"