Comment 0 for bug 1752519

While producing wheels image from upper-constraints, docker build commands fails with error

Could not find a version that satisfies the requirement subprocess32 (from cmd2===0.8.0->-c /tmp/wheels/upper-constraints.txt (line 395)) (from versions: )
No matching distribution found for subprocess32 (from cmd2===0.8.0->-c /tmp/wheels/upper-constraints.txt (line:395))

Upon attempting to install subprocess32 on an out of box Ubuntu, found that we need build essential files which are probably

1. gcc
2. build-essential
3. python-dev

Not certain if python-dev is must, but after installing these I could proceed further