FROM ubuntu:16.04

RUN apt-get update
    && apt-get upgrade -y
    && apt-get install -y
    git
    make
    python-pip
    python2.7
    python2.7-dev
    ssh
    && apt-get autoremove
    && apt-get clean

ARG password
ARG username
ENV password $password
ENV username $username

RUN pip install git+http://$username:$password@org.bitbucket.com/scm/do/repo.git

docker build -t myimage:v1 --build-arg password="somepassoword" --build-arg username="someuser" .

Step 8/8 : RUN pip install git+http://$username:$password@org.bitbucket.com/scm/do/repo.git
 ---> Running in 650d9423b549
Collecting git+http://someuser:somepassword@org.bitbucket.com/scm/do/repo.git