If you want to build Docker from source like this:

# git clone https://github.com/docker/docker.git # cd docker # make

But your working server is actually behind a proxy, I think you may run into errors as the follows:

# make mkdir bundles docker build -t "docker-dev:master" -f "Dockerfile" . Sending build context to Docker daemon 145.8 MB Step 1 : FROM debian:jessie ---> f854eed3f31f Step 2 : RUN apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys E871F18B51E0147C77796AC81196BA81F6B0FC61 || apt-key adv --keyserver hkp://pgp.mit.edu:80 --recv-keys E871F18B51E0147C77796AC81196BA81F6B0FC61 ---> Running in fede03b56767 Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --homedir /tmp/tmp.MjO7kIEOm8 --no-auto-check-trustdb --trust-model always --primary-keyring /etc/apt/trusted.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-security-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-stable.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-squeeze-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-squeeze-stable.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-wheezy-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-wheezy-stable.gpg --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys E871F18B51E0147C77796AC81196BA81F6B0FC61 gpg: requesting key F6B0FC61 from hkp server p80.pool.sks-keyservers.net gpgkeys: key E871F18B51E0147C77796AC81196BA81F6B0FC61 can't be retrieved gpg: no valid OpenPGP data found. gpg: Total number processed: 0 Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --homedir /tmp/tmp.6clUfj4AwL --no-auto-check-trustdb --trust-model always --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-security-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-jessie-stable.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-squeeze-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-squeeze-stable.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-wheezy-automatic.gpg --keyring /etc/apt/trusted.gpg.d/debian-archive-wheezy-stable.gpg --keyserver hkp://pgp.mit.edu:80 --recv-keys E871F18B51E0147C77796AC81196BA81F6B0FC61 gpg: requesting key F6B0FC61 from hkp server pgp.mit.edu gpgkeys: key E871F18B51E0147C77796AC81196BA81F6B0FC61 can't be retrieved gpg: no valid OpenPGP data found. gpg: Total number processed: 0 The command '/bin/sh -c apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys E871F18B51E0147C77796AC81196BA81F6B0FC61 || apt-key adv --keyserver hkp://pgp.mit.edu:80 --recv-keys E871F18B51E0147C77796AC81196BA81F6B0FC61' returned a non-zero code: 2 Makefile:70: recipe for target 'build' failed make: *** [build] Error 1

Or:

...... RUN apt-get update && apt-get install -y apparmor apt-utils aufs-tools automake bash-completion binutils-mingw-w64 bsdmainutils btrfs-tools build-essential clang createrepo curl dpkg-sig gcc-mingw-w64 git iptables jq libapparmor-dev libcap-dev libltdl-dev libsqlite3-dev libsystemd-journal-dev libtool mercurial net-tools pkg-config python-dev python-mock python-pip python-websocket ubuntu-zfs xfsprogs libzfs-dev tar zip --no-install-recommends && pip install awscli==1.10.15 ---> Running in 37080c364862 Get:1 http://ppa.launchpad.net trusty InRelease [8127 B] Get:2 http://httpredir.debian.org jessie InRelease [8127 B] Get:3 http://security.debian.org jessie/updates InRelease [8127 B] Splitting up /var/lib/apt/lists/partial/ppa.launchpad.net_zfs-native_stable_ubuntu_dists_trusty_InRelease into data and signature failedIgn http://ppa.launchpad.net trusty InRelease E: GPG error: http://ppa.launchpad.net trusty InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?) The command '/bin/sh -c apt-get update && apt-get install -y apparmor apt-utils aufs-tools automake bash-completion binutils-mingw-w64 bsdmainutils btrfs-tools build-essential clang createrepo curl dpkg-sig gcc-mingw-w64 git iptables jq libapparmor-dev libcap-dev libltdl-dev libsqlite3-dev libsystemd-journal-dev libtool mercurial net-tools pkg-config python-dev python-mock python-pip python-websocket ubuntu-zfs xfsprogs libzfs-dev tar zip --no-install-recommends && pip install awscli==1.10.15' returned a non-zero code: 100 make: *** [build] Error 1

These reports can make you crazy!

The solution is adding proxy into Dockerfile which resides in the root directory of Docker folder:

...... FROM debian:jessie ENV http_proxy http://web-proxy.corp.xxxxxx.com:8080/ ENV https_proxy https://web-proxy.corp.xxxxxx.com:8080/ ......

Then the make progress will be smooth!