diff --git a/boards/sim/sim/sim/configs/zig/defconfig b/boards/sim/sim/sim/configs/zig/defconfig
deleted file mode 100644
index 6463ef6f50..0000000000
--- a/boards/sim/sim/sim/configs/zig/defconfig
+++ /dev/null
@@ -1,66 +0,0 @@
-#
-# 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 0c58529c86..897dd22bcf 100644
--- a/boards/sim/sim/sim/scripts/Make.defs
+++ b/boards/sim/sim/sim/scripts/Make.defs
@@ -103,9 +103,6 @@ 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 f8cd1b1625..48aa2b3fb0 100644
--- a/tools/Config.mk
+++ b/tools/Config.mk
@@ -312,24 +312,6 @@ 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 838f1959de..1e720078c4 100755
--- a/tools/ci/cibuild.sh
+++ b/tools/ci/cibuild.sh
@@ -381,24 +381,6 @@ 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 8838dee399..7e26869875 100644
--- a/tools/ci/docker/linux/Dockerfile
+++ b/tools/ci/docker/linux/Dockerfile
@@ -34,7 +34,6 @@ RUN apt-get update -qq && DEBIAN_FRONTEND="noninteractive" apt-get install -y -q
   cmake \
   g++ \
   gawk \
-  jq \
   git
 
 RUN mkdir /tools
@@ -69,12 +68,6 @@ 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" ]
 
 ###############################################################################
@@ -276,10 +269,6 @@ 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"