diff --git a/docker/mingw/Dockerfile b/docker/mingw/Dockerfile
index 2c2b1da0..2f522246 100644
--- a/docker/mingw/Dockerfile
+++ b/docker/mingw/Dockerfile
@@ -23,7 +23,7 @@ FROM debian:testing
 ARG REPO=shadowsocks
 ARG REV=master
 
-ADD prepare.sh /
+ADD docker/mingw/prepare.sh /
 
 RUN \
   /bin/bash -c "source /prepare.sh && dk_prepare" && \
@@ -32,12 +32,15 @@ RUN \
 
 RUN /bin/bash -c "source /prepare.sh && dk_download"
 
-ADD deps.sh /
+ADD docker/mingw/deps.sh /
 RUN /bin/bash -c "source /deps.sh && dk_deps"
 
-ADD build.sh /
+ADD docker/mingw/build.sh /
 
 ARG REBUILD=0
-ARG PLUGIN=true
 
-RUN /bin/bash -c "source /build.sh && dk_build && dk_package"
+ADD . /build/src/proj
+
+RUN /bin/bash -c "source /build.sh && dk_build"
+
+RUN /bin/bash -c "source /build.sh && dk_package"
diff --git a/docker/mingw/Makefile b/docker/mingw/Makefile
index f3fdef38..6bd35a1a 100644
--- a/docker/mingw/Makefile
+++ b/docker/mingw/Makefile
@@ -20,17 +20,17 @@
 
 REPO=shadowsocks
 REV=master
-PLUGIN=true
 IMAGE=ss-build-mingw
 DIST=ss-libev-win-dist.tar.gz
 
 all: build
 
 build:
-	docker build --force-rm -t $(IMAGE) \
+	cd ../../ && docker build -t $(IMAGE) \
+	  -f docker/mingw/Dockerfile \
 	  --build-arg REV=$(REV) --build-arg REPO=$(REPO) \
 	  --build-arg REBUILD="$$(date +%Y-%m-%d-%H-%M-%S)" \
-	  --build-arg PLUGIN=$(PLUGIN) .
+	  .
 	docker run --rm --entrypoint cat $(IMAGE) /bin.tgz > $(DIST)
 
 clean:
diff --git a/docker/mingw/build.sh b/docker/mingw/build.sh
index 1cdccdd4..fea0265b 100644
--- a/docker/mingw/build.sh
+++ b/docker/mingw/build.sh
@@ -32,15 +32,9 @@ build_proj() {
     cpu="$(nproc --all)"
 
     cd "$SRC"
-    if ! [ -d proj ]; then
-        git clone ${PROJ_URL} proj
-        cd proj
-        git checkout ${PROJ_REV}
-        git submodule update --init
-        ./autogen.sh
-    else
-        cd proj
-    fi
+    cd proj
+
+    ./autogen.sh
     ./configure --host=${host} --prefix=${prefix} \
       --disable-documentation \
       --with-ev="$dep" \
@@ -52,29 +46,6 @@ build_proj() {
     make clean
     make -j$cpu LDFLAGS="-all-static -L${dep}/lib"
     make install
-
-    # Reference SIP003 plugin (Experimental)
-    [[ "${PLUGIN}" != "true" ]] && return 0
-
-    PLUGIN_URL=https://github.com/${PROJ_SITE}/simple-obfs.git
-    PLUGIN_REV=master
-
-    cd "$SRC"
-    if ! [ -d plugin ]; then
-        git clone ${PLUGIN_URL} plugin
-        cd plugin
-        git checkout ${PLUGIN_REV}
-        git submodule update --init
-        ./autogen.sh
-    else
-        cd plugin
-    fi
-    ./configure --host=${host} --prefix=${prefix} \
-      --disable-documentation \
-      --with-ev="$dep"
-    make clean
-    make -j$cpu LDFLAGS="-all-static -L${dep}/lib"
-    make install
 }
 
 dk_build() {
@@ -93,20 +64,6 @@ dk_package() {
         cp ${DIST}/i686/bin/ss-${bin}.exe ss-${bin}-x86.exe
         cp ${DIST}/x86_64/bin/ss-${bin}.exe ss-${bin}-x64.exe
     done
-    for bin in local server; do
-        cp ${DIST}/i686/bin/obfs-${bin}.exe obfs-${bin}-x86.exe || true
-        cp ${DIST}/x86_64/bin/obfs-${bin}.exe obfs-${bin}-x64.exe || true
-    done
-    pushd "$SRC/proj"
-    GIT_REV="$(git rev-parse --short HEAD)"
-    popd
-    echo "SHA1 checksum for build $(date +"%y%m%d")-${GIT_REV}" > checksum
-    for f in *.exe; do
-        echo "  $f:" >> checksum
-        echo "    $(sha1sum $f | cut -d ' ' -f 1)" >> checksum
-    done
-    sed -e 's/$/\r/' checksum > checksum.txt
-    rm -f checksum
     cd ..
     tar zcf /bin.tgz ss-libev-${PROJ_REV}
 }