diff --git a/utils/build-overlay b/utils/build-overlay
deleted file mode 100755
index 039d61369b88e..0000000000000
--- a/utils/build-overlay
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/bin/bash
-
-function usage {
-  echo "usage: $0 OVERLAY SDK TARGET"
-  echo "SDK: OSX,IOS,IOS_SIMULATOR,TVOS,TVOS_SIMULATOR,WATCHOS,WATCHOS_SIMULATOR"
-  echo "TARGET: macosx,iphoneos,iphonesimulator,appletvos,appletvsimulator,watchos,watchsimulator"
-  echo "example: ./utils/build-overlay AVFoundation OSX macosx"
-  exit 1
-}
-
-OVERLAY=$1; SDK=$2; TARGET=$3
-if [ ! "$OVERLAY" ]; then echo "Overlay param required"; usage; fi
-if [ ! "$SDK" ]; then echo "SDK param required"; usage; fi
-if [ ! "$TARGET" ]; then echo "TARGET param required"; usage; fi
-
-function absolute_path { if [[ "$1" == /* ]]; then echo "$1"; else echo "$PWD/$1"; fi }
-function dir_name { echo "${1%/*}"; }
-function file_name { echo "${1##*/}"; }
-script_absolute_path=$(absolute_path "${BASH_SOURCE[@]}")
-script_dir_name=$(dir_name "${script_absolute_path}")
-script_file_name=$(file_name "${script_absolute_path}")
-overlay_source_path="${script_dir_name}/../stdlib/public/Darwin/$OVERLAY"
-build_dir="${script_dir_name}/../../build/${OVERLAY}-${SDK}"
-swift_source_root="${script_dir_name}/../../../"
-
-mkdir -p "$build_dir" && cd "$build_dir" || exit
-
-echo "OVERLAY: ${OVERLAY}"
-echo "SDK: ${SDK}"
-echo "TARGET: ${TARGET}"
-echo "script_absolute_path: ${script_absolute_path}"
-echo "script_dir_name: ${script_dir_name}"
-echo "script_file_name: ${script_file_name}"
-echo "overlay_source_path: ${overlay_source_path}"
-echo "swift_source_root: ${swift_source_root}"
-echo "build_dir: ${build_dir}"
-
-toolchain=$(xcode-select -p)
-cmake -G Ninja -DSWIFT_SOURCE_ROOT="${swift_source_root}" -DSWIFT_DEST_ROOT="${build_dir}/root" -DSWIFT_HOST_VARIANT_SDK="${SDK}" -DTOOLCHAIN_DIR="${toolchain}/Toolchains/XcodeDefault.xctoolchain" "${overlay_source_path}"
-NINJA_TARGET="swift${OVERLAY}-${TARGET}"
-ninja "${NINJA_TARGET}"