'You should find replacements for the following formulae: ilmbase' and 'Refusing to uninstall ilmbase because it is required by vcs'

Brew doctor shows me:

Warning: Some installed formulae are deprecated or disabled.
You should find replacements for the following formulae:
  ilmbase

Because I don't know the package ilmbase and didn't find much info with Brave Search about it, I tried:

brew uninstall --zap ilmbase
Error: Refusing to uninstall /usr/local/Cellar/ilmbase/2.5.7
because it is required by vcs, which is currently installed.
You can override this and force removal with:
  brew uninstall --ignore-dependencies ilmbase

vcs is a package I wish to keep and use.

But in vcs there seems no ilmbase dependency? See ==> Dependencies list.

brew info vcs
vcs: stable 1.13.4 (bottled)
Creates video contact sheets (previews) of videos
https://p.outlyer.net/vcs/
/usr/local/Cellar/vcs/1.13.4_3 (12 files, 249.2KB) *
  Poured from bottle on 2021-01-08 at 16:56:55
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/vcs.rb
==> Dependencies
Required: ffmpeg ✔, ghostscript ✔, gnu-getopt ✔, imagemagick ✔
==> Analytics
install: 61 (30 days), 150 (90 days), 983 (365 days)
install-on-request: 60 (30 days), 149 (90 days), 976 (365 days)
build-error: 0 (30 days)

What's wrong here? Is this a bug? How to get rid of ilmbase, but keep vcs?

Solution 1:

I had this issue as well but, I updated xcode-tools and then did...

brew upgrade ilmbase

This resolved my issue.

Solution 2:

I also got this message while running brew doctor. It seems ilmbase was previously installed because ImageMagick (among other libraries) relied on it. The ilmbase formula reveals that the ilmbase library has since been renamed/replaced by the OpenEXR library.

If you are getting errors when trying to remove ilmbase or are seeing packages that still rely on it, consider running brew update and then brew upgrade to resolve any potential outdated dependency references. Also consider running brew doctor again in case that reveals any relevant information.

After updating and upgrading, I verified that nothing relied on ilmbase:

brew uses --installed ilmbase

And then uninstalled it:

brew uninstall ilmbase

You can also verify whether or not the updated versions of your library (e.g. ImageMagick) are using OpenEXR:

brew deps --installed imagemagick
brew uses --installed openexr