diff --git a/release.sh b/release.sh
new file mode 100755
index 0000000..f363863
--- /dev/null
+++ b/release.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+set -ex
+
+if [ $# -lt 1 ]; then
+    echo $0 tag
+    exit 1
+fi
+
+TAG=$1
+
+time docker build -f Dockerfile . -t mstorsjo/llvm-mingw:latest -t mstorsjo/llvm-mingw:$TAG
+time docker build -f Dockerfile.dev . -t mstorsjo/llvm-mingw:dev -t mstorsjo/llvm-mingw:dev-$TAG
+
+DISTRO=ubuntu-16.04
+docker run --rm mstorsjo/llvm-mingw:latest sh -c "cd /opt && mv llvm-mingw llvm-mingw-$TAG-$DISTRO && tar -Jcvf - llvm-mingw-$TAG-$DISTRO" > llvm-mingw-$TAG-$DISTRO.tar.xz
+
+cleanup() {
+    for i in $temp_images; do
+        docker rmi --no-prune $i || true
+    done
+}
+
+trap cleanup EXIT
+
+for arch in i686 x86_64 armv7 aarch64; do
+    temp=$(uuidgen)
+    temp_images="$temp_images $temp"
+    time docker build -f Dockerfile.cross --build-arg BASE=mstorsjo/llvm-mingw:dev --build-arg CROSS_ARCH=$arch --build-arg TAG=$TAG- -t $temp .
+    ./extract-docker.sh $temp /llvm-mingw-$TAG-$arch.zip
+done