diff --git a/config.sh.blank b/config.sh.blank
index 5b9c145..8c78c9e 100644
--- a/config.sh.blank
+++ b/config.sh.blank
@@ -1 +1,4 @@
-# PACKET_BUILD_DIR=/data/builder
\ No newline at end of file
+# PACKET_BUILD_DIR=/data/builder
+# PROXY=http://1.2.3.4:1234
+# DOCKER_BUILD_OPTIONS="--build-arg=http_proxy=$PROXY --build-arg=https_proxy=$PROXY"
+# DOCKER_RUN_OPTIONS="-e http_proxy=$PROXY -e https_proxy=$PROXY"
diff --git a/docker-builder-i386/build.sh b/docker-builder-i386/build.sh
index 1fb5dee..8d92e21 100755
--- a/docker-builder-i386/build.sh
+++ b/docker-builder-i386/build.sh
@@ -3,4 +3,4 @@
 SCRIPT_FILE=`realpath "$0"`
 SCRIPT_DIR=`dirname "$SCRIPT_FILE"`
 
-docker build -t my/builder-i386 "$SCRIPT_DIR"
+docker build -t my/builder-i386 $DOCKER_BUILD_OPTIONS "$SCRIPT_DIR"
diff --git a/docker-builder-i386/run.sh b/docker-builder-i386/run.sh
index 018f895..0e2e135 100755
--- a/docker-builder-i386/run.sh
+++ b/docker-builder-i386/run.sh
@@ -21,6 +21,7 @@ mkdir -p $PACKET_BUILD_DIR
 
 docker run -it \
     --name "builder-i386" \
+    $DOCKER_RUN_OPTIONS \
     -v "$PACKET_BUILD_DIR:/build/packet" \
     -v "$SCRIPT_BUILD_DIR:/build/script" \
     -e PLATFORM=linux-i386 \
diff --git a/docker-builder/build.sh b/docker-builder/build.sh
index c108b43..09e245a 100755
--- a/docker-builder/build.sh
+++ b/docker-builder/build.sh
@@ -2,5 +2,16 @@
 
 SCRIPT_FILE=`realpath "$0"`
 SCRIPT_DIR=`dirname "$SCRIPT_FILE"`
+BASE_DIR=`dirname "$SCRIPT_DIR"`
 
-docker build -t my/builder "$SCRIPT_DIR"
+CONFIG_FILE="$BASE_DIR/config.sh"
+PACKET_BUILD_DIR="$BUILD_DIR/packet"
+SCRIPT_BUILD_DIR="$BUILD_DIR/script"
+if [ -f $CONFIG_FILE ]; then
+	source $CONFIG_FILE
+fi
+export PACKET_BUILD_DIR
+mkdir -p $PACKET_BUILD_DIR
+
+
+docker build -t my/builder $DOCKER_BUILD_OPTIONS "$SCRIPT_DIR"
diff --git a/docker-builder/run.sh b/docker-builder/run.sh
index 64c5f17..1333de6 100755
--- a/docker-builder/run.sh
+++ b/docker-builder/run.sh
@@ -21,6 +21,7 @@ mkdir -p $PACKET_BUILD_DIR
 
 docker run -it \
     --name "builder" \
+    $DOCKER_RUN_OPTIONS \
     -v "$PACKET_BUILD_DIR:/build/packet" \
     -v "$SCRIPT_BUILD_DIR:/build/script" \
     my/builder \