Repository not found when running mage build

[emcfins]

I'm trying to build trivy locally but it looks like I'm running into a snag. I'm following the directions on this page but when I go to run mage build, I'm getting an error:

	github.com/mitchellh/osext@v0.0.0-20151018003038-5e2d6d41470f: invalid version: git ls-remote -q origin in /Users/<snip>/go/pkg/mod/cache/vcs/94ed57c5b21c953d93b47487113db43a5c9b69fd990329ec70dc77348c4dd443: exit status 128:
	ERROR: Repository not found.
	fatal: Could not read from remote repository.

	Please make sure you have the correct access rights
	and the repository exists.

It's been able to pull from other repositories until it reaches this one. Not sure what I'm doing wrong but any pointer in the right direction would be greatly appreciated.

[knqyf263]

It seems like the repository has been removed.
https://github.com/mitchellh/osext

It can be downloaded via Go proxy.

GOPROXY=https://proxy.golang.org,direct

https://proxy.golang.org/github.com/mitchellh/osext/@v/v0.0.0-20151018003038-5e2d6d41470f.info