I am able to create a new project just fine with pyflow init or pyflow new <name>. But after creating the project, I can't even install packages, or view a list of what's installed because pyflow aborts graph creation.
I get this error when I try to run pyflow install numpy like in the README:

Environment
- Windows 10
- PyFlow 0.3.1 (installed by the Windows installer)
- shell: Git Bash