Homebrew failed to download resource "nip2", 404 error

[Fleiz-Eiz]

I received the following error when attempting to install nip2 using Homebrew on Mac OSX High Sierra:
curl: (22) The requested URL returned error: 404 Not Found
Error: Failed to download resource "nip2"
Download failed: http://www.vips.ecs.soton.ac.uk/supported/8.4/nip2-8.4.0.tar.gz

Obviously, the url for nip2 in Homebrew isn't up to date. I've updated Homebrew twice and ran brew doctor, but I get the same error message. Is there an easy way to tell Homebrew to use the new url for nip2-8.6.0? I've already successfully installed VIP-8.6.0 using Homebrew.

Thank you

[jcupitt]

Hello, I need to fix up the nip2 formula, I think it's been broken for a while :(

There's a nip2 macOS binary here:

https://github.com/jcupitt/nip2/releases/tag/v8.6.0-beta2

It might be useful. It was made by this thing:

https://github.com/jcupitt/build-osx