Netlify Ruby-based build fails with "You have to install development tools first." when building a native gem

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Hi all,

I’ve used Netlify previews and deploys for my personal blog for sometime, though it had gone stale recently.

on Nov 5, I succeeded in a deployment where I changed the Ruby version from 3.3.4 to 3.3.6. This was to remain in line with GitHub Pages v232 release. Build log: Netlify

I am able to build and serve the site with Jekyll just fine from a devcontainer or from GitHub Pages, but the Netlify build fails.

An example of a failed build, which fails during initialization, is here: Netlify

The error appears to be that when attempting to build native gem extensions, Ruby fails because the ruby dev tools are not installed. I assume this would be a default install for the Netlify platform, but maybe something has changed with the build images?

Sample from the logs:

5:52:00 PM: Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
5:52:00 PM: current directory:
5:52:00 PM: /opt/build/cache/bundle/ruby/3.3.0/gems/bigdecimal-3.1.8/ext/bigdecimal
5:52:00 PM: /opt/buildhome/.rvm/rubies/ruby-3.3.4/bin/ruby extconf.rb
5:52:00 PM: checking for __builtin_clz()... *** extconf.rb failed ***
5:52:00 PM: Could not create Makefile due to some reason, probably lack of necessary
5:52:00 PM: libraries and/or headers.  Check the mkmf.log file for more details.  You may
5:52:00 PM: need configuration options.
5:52:00 PM: Provided configuration options:
5:52:00 PM: 	--with-opt-dir
5:52:00 PM: 	--without-opt-dir
5:52:00 PM: 	--with-opt-include=${opt-dir}/include
5:52:00 PM: 	--without-opt-include
5:52:00 PM: 	--with-opt-lib=${opt-dir}/lib
5:52:00 PM: 	--without-opt-lib
5:52:00 PM: 	--with-make-prog
5:52:00 PM: 	--without-make-prog
5:52:00 PM: 	--srcdir=.
5:52:00 PM: 	--curdir
5:52:00 PM: 	--ruby=/opt/buildhome/.rvm/rubies/ruby-3.3.4/bin/$(RUBY_BASE_NAME)
5:52:00 PM: /opt/buildhome/.rvm/rubies/ruby-3.3.4/lib/ruby/3.3.0/mkmf.rb:480:in `try_do':
The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.

Full source can be found at GitHub - SeanKilleen/seankilleen.github.io: The blog reboot.

2

Nevermind, this was entirely on me. I hadn’t merged a branch apparently, and so the ruby versions were off.

Sorry for the false alarm! This is completely resolved.

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