Macvim from Homebrew formula missing ruby@4.0

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
68/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Active
Tech stack
macos, ruby, vim
Domain
build-system

Research direction

Start by reproducing the failure with brew install macvim, then inspect the Homebrew formula and its dependency or build entry points for the missing ruby@4.0 library. Done means a clean MacVim launch works both through MacVim.app and mvim/gvim, including with --clean.

Written by the indexing model from the issue text.

Description

Steps to reproduce

Install macvim via homebrew via brew install macvim and then either launch the macvim via GUI or terminal. The error message I got is:

dyld[20899]: Library not loaded: /opt/homebrew/opt/ruby@4.0/lib/libruby.4.0.dylib
Referenced from: <52A6DA3C-2DB7-33B3-B925-C83D0C432B8E> /opt/homebrew/Cellar/macvim/9.2.0321/MacVim.app/Contents/MacOS/Vim
Reason: tried: '/opt/homebrew/opt/ruby@4.0/lib/libruby.4.0.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/opt/homebrew/opt/ruby@4.0/lib/libruby.4.0.dylib' (no such file), '/opt/homebrew/opt/ruby@4.0/lib/libruby.4.0.dylib' (no such file)

Expected behaviour

Launch correctly

Version of MacVim

9.2.0321

MacVim installation method

Homebrew formula: brew install macvim

Environment

macOS 26.6.2

Logs and stack traces
dyld[20830]: Library not loaded: /opt/homebrew/opt/ruby@4.0/lib/libruby.4.0.dylib
  Referenced from: <52A6DA3C-2DB7-33B3-B925-C83D0C432B8E> /opt/homebrew/Cellar/macvim/9.2.0321/MacVim.app/Contents/MacOS/Vim
  Reason: tried: '/opt/homebrew/opt/ruby@4.0/lib/libruby.4.0.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/opt/homebrew/opt/ruby@4.0/lib/libruby.4.0.dylib' (no such file), '/opt/homebrew/opt/ruby@4.0/lib/libruby.4.0.dylib' (no such file)
Vim and MacVim configuration where issue is reproducable

No response

How was MacVim launched?
  • by launching MacVim.app in macOS (by using the Dock, Spotlight, or the open command)
  • by running mvim/gvim in the terminal
Issue has been tested with clean configuration
  • by running mvim --clean (or gvim, supplied by MacVim distribution). You can also use the File → "New Clean Window" menu item within MacVim.
  • by running vim --clean (in terminal, supplied by MacVim distribution)
  • by running vim --clean (in terminal, other suppliers, e.g. /usr/bin/vim)
Dominant language
Vim Script
Stars
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Forks
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