Ignoring vim .swp files?

[matrixes]

How do I ignore files with the pattern ".*.swp" during compilation?

I'm using ^1.7 of Jigsaw and am running into an issue I can't circumvent.
I'm using a pretty much unedited config.php and webpack.mix.js from the "docs" starter template.

When running npm run dev or npm run watch while having a file open in vim (which creates a temporary file with the file extension ".swp") I get an error InvalidArgumentException Unrecognized extension in file: /root/app/source/.index.blade.php.swp.

I've tried to figure out if there's a way to tell the build process to ignore certain files or patterns, but my attempts have failed so far.

Any hints or tips are welcome!