diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0df03fe..74d6fec 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -5,9 +5,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-latest, windows-latest]
         java-version: [8, 11]
+
     runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.java-version == '11' && matrix.os == 'windows-latest' }}
 
     steps:
       - uses: actions/checkout@v2
@@ -18,6 +20,12 @@ jobs:
         with:
           java-version: ${{ matrix.java-version }}
 
-      - run: mvn -N io.takari:maven:wrapper -Dmaven=3.5.0
+      - run: ./millw -i __.publishLocal testRepo
+        if: matrix.os != 'windows-latest'
+      - run: .\millw.bat -i __.publishLocal testRepo
+        if: matrix.os == 'windows-latest'
 
-      - run: ./mvnw clean package source:jar javadoc:jar install
+      - run: ./millw -i -k __.testCached
+        if: matrix.os != 'windows-latest'
+      - run: ./millw.bat -i -k __.testCached
+        if: matrix.os == 'windows-latest'
diff --git a/.mill-version b/.mill-version
new file mode 100644
index 0000000..a602fc9
--- /dev/null
+++ b/.mill-version
@@ -0,0 +1 @@
+0.9.4
diff --git a/millw b/millw
new file mode 100755
index 0000000..da38ba5
--- /dev/null
+++ b/millw
@@ -0,0 +1,117 @@
+#!/usr/bin/env sh
+
+# This is a wrapper script, that automatically download mill from GitHub release pages
+# You can give the required mill version with --mill-version parameter
+# If no version is given, it falls back to the value of DEFAULT_MILL_VERSION
+#
+# Project page: https://github.com/lefou/millw
+#
+# If you want to improve this script, please also contribute your changes back!
+#
+# Licensed under the Apache License, Version 2.0
+
+
+DEFAULT_MILL_VERSION=0.5.0
+
+set -e
+
+# Explicit commandline argument takes precedence over all other methods
+if [ "x$1" = "x--mill-version" ] ; then
+  shift
+  if [ "x$1" != "x" ] ; then
+    MILL_VERSION="$1"
+    shift
+  else
+    echo "You specified --mill-version without a version."
+    echo "Please provide a version that matches one provided on"
+    echo "https://github.com/lihaoyi/mill/releases"
+    false
+  fi
+fi
+
+# Please note, that if a MILL_VERSION is already set in the environment,
+# We reuse it's value and skip searching for a value.
+
+# If not already set, read .mill-version file
+if [ "x${MILL_VERSION}" = "x" ] ; then
+  if [ -f ".mill-version" ] ; then
+    MILL_VERSION="$(head -n 1 .mill-version 2> /dev/null)"
+  fi
+fi
+
+if [ "x${XDG_CACHE_HOME}" != "x" ] ; then
+  MILL_DOWNLOAD_PATH="${XDG_CACHE_HOME}/mill/download"
+else
+  MILL_DOWNLOAD_PATH="${HOME}/.cache/mill/download"
+fi
+
+# If not already set, try to fetch newest from Github
+if [ "x${MILL_VERSION}" = "x" ] ; then
+  # TODO: try to load latest version from release page
+  echo "No mill version specified."
+  echo "You should provide a version via '.mill-version' file or --mill-version option."
+
+  mkdir -p "${MILL_DOWNLOAD_PATH}"
+  LANG=C touch -d '1 hour ago' "${MILL_DOWNLOAD_PATH}/.expire_latest"
+  if [ "${MILL_DOWNLOAD_PATH}/.latest" -nt "${MILL_DOWNLOAD_PATH}/.expire_latest" ] ; then
+    # we know a current latest version
+    MILL_VERSION="$(head -n 1 ${MILL_DOWNLOAD_PATH}/.latest 2> /dev/null)"
+  fi
+
+  if [ "x${MILL_VERSION}" = "x" ] ; then
+    # we don't know a current latest version
+    echo "Retrieving latest mill version ..."
+    LANG=C curl -s -i -f -I https://github.com/lihaoyi/mill/releases/latest 2> /dev/null  | grep --ignore-case Location: | sed s'/^.*tag\///' | tr -d '\r\n' > "${MILL_DOWNLOAD_PATH}/.latest" 
+    MILL_VERSION="$(head -n 1 ${MILL_DOWNLOAD_PATH}/.latest 2> /dev/null)"
+  fi
+
+  if [ "x${MILL_VERSION}" = "x" ] ; then
+    # Last resort
+    MILL_VERSION="${DEFAULT_MILL_VERSION}"
+    echo "Falling back to hardcoded mill version ${MILL_VERSION}"
+  else
+    echo "Using mill version ${MILL_VERSION}"
+  fi
+fi
+
+MILL="${MILL_DOWNLOAD_PATH}/${MILL_VERSION}"
+
+# If not already downloaded, download it
+if [ ! -s "${MILL}" ] ; then
+  
+  # support old non-XDG download dir
+  MILL_OLD_DOWNLOAD_PATH="${HOME}/.mill/download"
+  OLD_MILL="${MILL_OLD_DOWNLOAD_PATH}/${MILL_VERSION}"
+  if [ -x "${OLD_MILL}" ] ; then
+    MILL="${OLD_MILL}"
+  else
+    VERSION_PREFIX="$(echo -n $MILL_VERSION | cut -b -4)"
+    case $VERSION_PREFIX in
+      0.0. | 0.1. | 0.2. | 0.3. | 0.4. )
+        DOWNLOAD_SUFFIX=""
+        ;;
+      *)
+        DOWNLOAD_SUFFIX="-assembly"
+        ;;
+    esac
+    unset VERSION_PREFIX
+
+    DOWNLOAD_FILE=$(mktemp mill.XXXX)
+    # TODO: handle command not found
+    echo "Downloading mill ${MILL_VERSION} from https://github.com/lihaoyi/mill/releases ..."
+    curl -L -o "${DOWNLOAD_FILE}" "https://github.com/lihaoyi/mill/releases/download/${MILL_VERSION%%-*}/${MILL_VERSION}${DOWNLOAD_SUFFIX}"
+    chmod +x "${DOWNLOAD_FILE}"
+    mkdir -p "${MILL_DOWNLOAD_PATH}"
+    mv "${DOWNLOAD_FILE}" "${MILL}"
+
+    unset DOWNLOAD_FILE
+    unset DOWNLOAD_SUFFIX
+  fi
+fi
+
+unset MILL_DOWNLOAD_PATH
+unset MILL_OLD_DOWNLOAD_PATH
+unset OLD_MILL
+unset MILL_VERSION
+
+exec $MILL "$@"