diff --git a/docker/scripts/0001-Disable-compiler-optimizations-and-inlining.patch b/docker/scripts/0001-Disable-compiler-optimizations-and-inlining.patch
new file mode 100644
index 000000000..3009320db
--- /dev/null
+++ b/docker/scripts/0001-Disable-compiler-optimizations-and-inlining.patch
@@ -0,0 +1,25 @@
+From 9bb7f70eb442b0bae3a3508b119b17e04b127630 Mon Sep 17 00:00:00 2001
+From: Levente Liu <leventeliu@outlook.com>
+Date: Thu, 23 May 2019 10:56:58 +0000
+Subject: [PATCH] Disable compiler optimizations and inlining
+
+---
+ meta/classes/go.bbclass | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/meta/classes/go.bbclass b/meta/classes/go.bbclass
+index 09b01a8..76f6d81 100644
+--- a/meta/classes/go.bbclass
++++ b/meta/classes/go.bbclass
+@@ -40,7 +40,7 @@ GO_EXTLDFLAGS ?= "${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS} ${GO_RPATH_LINK} ${LDFLAGS
+ GO_LINKMODE ?= ""
+ GO_LINKMODE_class-nativesdk = "--linkmode=external"
+ GO_LDFLAGS ?= '-ldflags="${GO_RPATH} ${GO_LINKMODE} -extldflags '${GO_EXTLDFLAGS}'"'
+-export GOBUILDFLAGS ?= "-v ${GO_LDFLAGS}"
++export GOBUILDFLAGS ?= "-v -gcflags='-N -l' ${GO_LDFLAGS}"
+ export GOPTESTBUILDFLAGS ?= "${GOBUILDFLAGS} -c"
+ export GOPTESTFLAGS ?= "-test.v"
+ GOBUILDFLAGS_prepend_task-compile = "${GO_PARALLEL_BUILD} "
+-- 
+1.9.1
+
diff --git a/docker/scripts/build.sh b/docker/scripts/build.sh
new file mode 100755
index 000000000..687e548dc
--- /dev/null
+++ b/docker/scripts/build.sh
@@ -0,0 +1,29 @@
+#! /usr/bin/env bash
+set -eo pipefail
+
+main() {
+    local workspace=/home/work/yocto
+    mkdir -p "$workspace"
+    cd "$workspace"
+
+    repo init -u https://source.codeaurora.org/external/imx/imx-manifest -b imx-linux-rocko -m imx-4.9.88-2.0.0_ga.xml
+    repo sync
+
+    sed -i 's/^EULA_ACCEPTED=$/EULA_ACCEPTED=1/' "$workspace/sources/base/setup-environment"
+    source ./fsl-setup-release.sh
+
+    # Patch go bbclass
+    cd "$workspace/sources/poky"
+    git apply /home/work/0001-Disable-compiler-optimizations-and-inlining.patch
+
+    # Patch repo and add covenantsql layer
+    git clone https://github.com/CovenantSQL/meta-covenantsql.git "$workspace/sources/meta-covenantsql"
+    echo 'ACCEPT_FSL_EULA = "1"' >>"$workspace/build/conf/local.conf"
+    echo 'BBLAYERS += " ${BSPDIR}/sources/meta-covenantsql"' >>"$workspace/build/conf/bblayers.conf"
+    echo 'IMAGE_INSTALL_append = "cql-minerd cql cqld"' >>"$workspace/build/conf/local.conf"
+
+    cd "$workspace"
+    bitbake core-image-base
+}
+
+main "$@"
diff --git a/docker/scripts/init.sh b/docker/scripts/init.sh
new file mode 100755
index 000000000..5f2f147b9
--- /dev/null
+++ b/docker/scripts/init.sh
@@ -0,0 +1,95 @@
+#! /usr/bin/env bash
+set -euo pipefail
+
+config_packages() {
+    apt-get update
+    apt-get install -y apt-transport-https
+    cat >/etc/apt/sources.list <<LIST
+# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
+deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiverse
+# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiverse
+deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
+# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-updates main restricted universe multiverse
+deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
+# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-backports main restricted universe multiverse
+deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
+# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-security main restricted universe multiverse
+
+# 预发布软件源，不建议启用
+# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
+# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty-proposed main restricted universe multiverse
+LIST
+
+    apt-get update
+    local packages=(
+        gawk
+        wget
+        git-core
+        diffstat
+        unzip
+        texinfo
+        gcc-multilib
+        build-essential
+        chrpath
+        socat
+        libsdl1.2-dev
+        xterm
+        sed
+        cvs
+        subversion
+        coreutils
+        texi2html
+        docbook-utils
+        python-pysqlite2
+        help2man
+        make
+        gcc
+        g++
+        desktop-file-utils
+        libgl1-mesa-dev
+        libglu1-mesa-dev
+        mercurial
+        autoconf
+        automake
+        groff
+        curl
+        lzop
+        asciidoc
+        u-boot-tools
+        cpio
+        sudo
+        locales
+    )
+    apt-get install -y "${packages[@]}"
+
+    curl -o/usr/bin/repo https://mirrors.tuna.tsinghua.edu.cn/git/git-repo
+    chmod +x /usr/bin/repo
+}
+
+config_user() {
+    local id=work
+    useradd --create-home "$id"
+    echo "$id ALL=(ALL:ALL) NOPASSWD:ALL" >>/etc/sudoers
+
+    mv /root/scripts/build.sh /home/work/
+    mv /root/scripts/0001-Disable-compiler-optimizations-and-inlining.patch /home/work
+    chown -R work:work /home/work
+}
+
+config_locale() {
+    locale-gen en_US.UTF-8
+    update-locale LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8
+    dpkg-reconfigure --frontend=noninteractive locales
+}
+
+main() {
+    if [[ $UID != 0 ]]; then
+        >&2 echo "Must run as root"
+        return 1
+    fi
+    config_packages
+    config_user
+    config_locale
+}
+
+main "$@"
diff --git a/docker/yocto-builder.Dockerfile b/docker/yocto-builder.Dockerfile
new file mode 100644
index 000000000..3d7c19aa2
--- /dev/null
+++ b/docker/yocto-builder.Dockerfile
@@ -0,0 +1,16 @@
+# Stage: builder
+FROM ubuntu:14.04
+
+COPY ./docker/scripts /root/scripts
+RUN /root/scripts/init.sh
+
+USER work
+WORKDIR /home/work
+ENV LC_ALL=en_US.UTF-8
+ENV LANG=en_US.UTF-8
+ENV LANGUAGE=en_US.UTF-8
+ENV DISTRO=fsl-imx-wayland
+ENV MACHINE=imx7ulpevk
+RUN ./build.sh
+
+CMD "/bin/bash"
diff --git a/vendor/github.com/ugorji/go/codec/encode.go b/vendor/github.com/ugorji/go/codec/encode.go
index 8462440c3..e4df612a0 100644
--- a/vendor/github.com/ugorji/go/codec/encode.go
+++ b/vendor/github.com/ugorji/go/codec/encode.go
@@ -364,9 +364,11 @@ func (z *bufioEncWriter) writestr(s string) {
 	// z.writeb(bytesView(s)) // inlined below
 LOOP:
 	a := len(z.buf) - z.n
+	fmt.Printf("copying %s to buffer: len=%d, n=%d, a=%d\n", s, len(z.buf), z.n, a)
 	if len(s) > a {
 		z.n += copy(z.buf[z.n:], s[:a])
 		s = s[a:]
+		fmt.Printf("copying %s to buffer result: n=%d\n", s, len(z.buf), z.n)
 		z.flush()
 		goto LOOP
 	}