Ruby LoadError with gmp?

[igouy]

Ubuntu 22.10

gem install gmp
Building native extensions. This could take a while...
Successfully installed gmp-0.7.43
Parsing documentation for gmp-0.7.43
Done installing documentation for gmp after 0 seconds
1 gem installed

$ cat gmp-test.rb
require 'gmp'

$ /opt/src/ruby-3.2.0/bin/ruby gmp-test.rb
<internal:/opt/src/ruby-3.2.0/lib/ruby/site_ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:85:in `require': cannot load such file -- /home/dunham/.local/share/gem/ruby/3.2.0/gems/gmp-0.7.43/lib/../ext/gmp (LoadError)
    from <internal:/opt/src/ruby-3.2.0/lib/ruby/site_ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
    from /home/dunham/.local/share/gem/ruby/3.2.0/gems/gmp-0.7.43/lib/gmp.rb:9:in `<top (required)>'
    from <internal:/opt/src/ruby-3.2.0/lib/ruby/site_ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:159:in `require'
    from <internal:/opt/src/ruby-3.2.0/lib/ruby/site_ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:159:in `rescue in require'
    from <internal:/opt/src/ruby-3.2.0/lib/ruby/site_ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:149:in `require'
    from gmp-test.rb:1:in `<main>'
<internal:/opt/src/ruby-3.2.0/lib/ruby/site_ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:85:in `require': cannot load such file -- gmp (LoadError)
    from <internal:/opt/src/ruby-3.2.0/lib/ruby/site_ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:85:in `require'
    from gmp-test.rb:1:in `<main>'

$ ls /home/dunham/.local/share/gem/ruby/3.2.0/gems/gmp-0.7.43/lib/../ext/gmp
ls: cannot access '/home/dunham/.local/share/gem/ruby/3.2.0/gems/gmp-0.7.43/lib/../ext/gmp': No such file or directory

$ ls /home/dunham/.local/share/gem/ruby/3.2.0/gems/gmp-0.7.43/ext
extconf.rb         gmpf.c  gmpq.h          gmpz.h    mprnd.h
gmpbench_timing.c  gmpf.h  gmprandstate.c  Makefile  ruby_gmp.h
gmp.c              gmpq.c  gmpz.c          mprnd.c   takeover.h