bundle install 時に rake が見つからなくてコケる例

docker_build.error.log

Fetching poppler 3.2.7
Installing poppler 3.2.7 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /usr/local/bundle/gems/poppler-3.2.7/dependency-check
rake RUBYARCHDIR=/usr/local/bundle/extensions/x86_64-linux/2.5.0/poppler-3.2.7
RUBYLIBDIR=/usr/local/bundle/extensions/x86_64-linux/2.5.0/poppler-3.2.7
/usr/local/lib/ruby/site_ruby/2.5.0/rubygems.rb:289:in `find_spec_for_exe':
can't find gem rake (>= 0.a) with executable rake (Gem::GemNotFoundException)
	from /usr/local/lib/ruby/site_ruby/2.5.0/rubygems.rb:308:in `activate_bin_path'
	from /usr/local/bin/rake:23:in `<main>'

rake failed, exit code 1

Gem files will remain installed in /usr/local/bundle/gems/poppler-3.2.7 for
inspection.
Results logged to
/usr/local/bundle/extensions/x86_64-linux/2.5.0/poppler-3.2.7/gem_make.out

An error occurred while installing poppler (3.2.7), and Bundler cannot continue.
Make sure that `gem install poppler -v '3.2.7' --source 'https://rubygems.org/'`
succeeds before bundling.

In Gemfile:
  poppler
The command '/bin/sh -c bundle' returned a non-zero code: 5

Dockerfile

FROM ruby
RUN apt-get update && apt-get install -y libpoppler-dev
WORKDIR /var/app
COPY Gemfile .
RUN bundle # こける
# `RUN gem install poppler && bundle` だと成功する

Gemfile

# frozen_string_literal: true

source "https://rubygems.org"

git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }

gem "poppler"