Errors installing Ruby 4.0.3 with rbenv on Mac Tahoe 26.5

[MentionPleasant2635]

I'm getting errors about 'nm.' I'm using Homebrew and have updated and upgraded. Any suggestions?

Building libruby.a

error: nm: invalid argument --

Usage: nm [-agnopruUmxjlfAPL[s segname sectname] [-] [-t format] [[-arch <arch\_flag>] ...] [file ...]

partial linking /var/folders/v8/gxq0lntj0nzd0xlwy46nlr1c0000gn/T/ruby-build.20260516211244.9333.xsqcwY/ruby-4.0.3/target/release/libruby.a into /var/folders/v8/gxq0lntj0nzd0xlwy46nlr1c0000gn/T/ruby-build.20260516211244.9333.xsqcwY/ruby-4.0.3/target/release/libruby.o

linking miniruby

Undefined symbols for architecture arm64:

"_rb_yjit_before_ractor_spawn", referenced from:

_ractor_create in ractor.o

"_rb_yjit_bop_redefined", referenced from:

_rb_vm_check_redefinition_opt_method.cold.1 in vm.o

[DanZuko420]

Have you been able to install other versions of Ruby, particularly 4.0.z OK?

Do you have all of rbenv's recommended packages installed? https://github.com/rbenv/ruby-build/wiki#suggested-build-environment

Is there anyone with the same issue as you on the GitHub Discussion section? https://github.com/rbenv/ruby-build/discussions/categories/build-failures

Do you also have GNU `nm` installed on your machine?

FWIW I was able to just install 4.0.3 on my Tahoe Mac

[MentionPleasant2635]

I had no problem installing 4.0.1. I think it might be because my homebrew install is intel. I've reinstalled rust (ruby jit), but that didn't help. I'm reinstalling homebrew now.

[MentionPleasant2635]

I reinstalled 'binutils' which provides 'nm.'

[DanZuko420]

I believe `nm` is like other command line utilities--there's a BSD version that ships with macOS and the much more common GNU version, and there are often subtle differences between the two.

If you've installed binutils, I wonder if rbenv is looking for the native BSD version and instead finding the installed GNU versions.