Fallout CLI autocompletion is not backward compatible with NukeBuild project

[PaysPlat]

Usage Information

Fallout 10.4 & Nuke 10.1

Description

Nuke -> Fallout migration shall not break backward compatibility with NukeBuild projects

Reproduction Steps

Use Fallout CLI tool on a repository with NukeBuild project.
Write command by using auto-completion

Expected Behavior

Fallout CLI tool auto-completion shall work with NukeBuild projects

Actual Behavior

Fallout CLI tool auto-completion fails on NukeBuild projects

Regression?

No response

Known Workarounds

No response

Could you help with a pull-request?

Yes