Unable to run 'gulp ff'

[ryanmichaelsmith]

Bug Information (visit the affected website → click the moon icon → "Send Feedback" → "Bug Report" → paste here)

• Site: NA
• Theme: NA
• URL: NA
• Darkness Version: Current master
• Browser: Firefox
• Operating System: Ubuntu WSL in Windows 10

Bug Description Unable to run 'gulp ff' due to what seems to be some kind of gulp/nodejs compatibility issue.

Nodejs version: 10.19.0\~dfsg-3ubuntu1 Gulp version: 4.0.2-6

Screenshots If necessary, add screenshots to help explain your problem.