'DISABLE_ESLINT_PLUGIN' is not recognized as an internal or external command

Errors:

'DISABLE_ESLINT_PLUGIN' is not recognized as an internal or external command
'SKIP_PREFLIGHT_CHECK' is not recognized as an internal or external command

Solution:
Use cross-env. Example:
cross-env DISABLE_ESLINT_PLUGIN=true SKIP_PREFLIGHT_CHECK=true