diff --git a/Meta/CMake/cmake-version.cmake b/Meta/CMake/cmake-version.cmake
new file mode 100644
index 00000000000..f38c247e40f
--- /dev/null
+++ b/Meta/CMake/cmake-version.cmake
@@ -0,0 +1,6 @@
+# Note: Update this alongside Toolchain/BuildCMake.sh
+set(version_ok 0)
+if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.25.1)
+    set(version_ok 1)
+endif()
+execute_process(COMMAND "${CMAKE_COMMAND}" -E echo "${version_ok}")
diff --git a/Toolchain/BuildCMake.sh b/Toolchain/BuildCMake.sh
new file mode 100755
index 00000000000..28da6098d78
--- /dev/null
+++ b/Toolchain/BuildCMake.sh
@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+
+# This script builds the CMake build system
+set -e
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+PREFIX_DIR="$DIR/Local/cmake"
+BUILD_DIR="$DIR/Build/cmake"
+TARBALLS_DIR="$DIR/Tarballs"
+
+NPROC="nproc"
+SYSTEM_NAME="$(uname -s)"
+
+if [ "$SYSTEM_NAME" = "OpenBSD" ]; then
+    NPROC="sysctl -n hw.ncpuonline"
+elif [ "$SYSTEM_NAME" = "FreeBSD" ]; then
+    NPROC="sysctl -n hw.ncpu"
+elif [ "$SYSTEM_NAME" = "Darwin" ]; then
+    NPROC="sysctl -n hw.ncpu"
+fi
+
+[ -z "$MAKEJOBS" ] && MAKEJOBS=$($NPROC)
+
+# Note: Update this alongside Meta/CMake/cmake-version.cmake
+CMAKE_VERSION=3.25.1
+CMAKE_ARCHIVE_SHA256=1c511d09516af493694ed9baf13c55947a36389674d657a2d5e0ccedc6b291d8
+CMAKE_ARCHIVE=cmake-${CMAKE_VERSION}.tar.gz
+CMAKE_ARCHIVE_URL=https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/${CMAKE_ARCHIVE}
+
+mkdir -p "$DIR"/Tarballs
+pushd "$DIR"/Tarballs
+    if [ ! -e "${CMAKE_ARCHIVE}" ]; then
+        echo "Downloading CMake from ${CMAKE_ARCHIVE_URL}..."
+        curl "${CMAKE_ARCHIVE_URL}" -L -o "${CMAKE_ARCHIVE}"
+    else
+        echo "${CMAKE_ARCHIVE} already exists, not downloading archive"
+    fi
+
+    if ! sha256sum --status -c <(echo "${CMAKE_ARCHIVE_SHA256}" "${CMAKE_ARCHIVE}"); then
+        echo "CMake archive SHA256 sum mismatch, please run script again"
+        rm -f "${CMAKE_ARCHIVE}"
+        exit 1
+    fi
+
+    if [ ! -d "cmake-${CMAKE_VERSION}" ]; then
+        echo "Extracting ${CMAKE_ARCHIVE}..."
+        tar -xf "${CMAKE_ARCHIVE}"
+    else
+        echo "cmake-${CMAKE_VERSION} already exists, not extracting archive"
+    fi
+popd
+
+mkdir -p "${PREFIX_DIR}"
+mkdir -p "${BUILD_DIR}"
+
+pushd "${BUILD_DIR}"
+    "${TARBALLS_DIR}"/cmake-"${CMAKE_VERSION}"/bootstrap --prefix="${PREFIX_DIR}" --parallel="${MAKEJOBS}"
+    make -j "${MAKEJOBS}"
+    make install
+popd