Bundle install (http_parser.rb-0.6.0) could not be found

Hello,
today I ran into a issue that I don’t quite understand. I am using docker with the ruby:latest image to build my Jekyll page with Drone. Todays builds failed with the error:

Fetching gem metadata from https://rubygems.org/..........
Could not find http_parser.rb-0.6.0 in any of the sources

I have no idea why its not working. I haven’t changed anything in the Gemfile.lock nor the jekyll-sleek.gemspec. Could someone maybe help me figure out what the issue is?

Here are both files:

jekyll-sleek.gemspec:

# coding: utf-8

Gem::Specification.new do |spec|
  spec.name          = "jekyll-sleek"
  spec.version       = "0.1.8"
  spec.authors       = ["Jan Czizikow"]
  spec.email         = ["jan.czizikow@gmail.com"]

  spec.summary       = %q{Sleek is a modern Jekyll theme focused on speed performance & SEO best practices.}
  spec.homepage      = "https://janczizikow.github.io/sleek/"
  spec.license       = "MIT"

  spec.files         = `git ls-files -z`.split("\x0").select do |f|
    f.match(%r!^(assets|_(includes|layouts|sass)/|(LICENSE|README)((\.(txt|md|markdown)|$)))!i)
  end

  spec.platform      = Gem::Platform::RUBY
  spec.add_runtime_dependency "jekyll", "~> 3.8"
  spec.add_runtime_dependency "jekyll-seo-tag", "~> 2.5"
  spec.add_runtime_dependency "jekyll-sitemap", "~> 1.2"
  spec.add_runtime_dependency "jekyll-git_metadata", "~> 0.2"

  spec.add_development_dependency "bundler", "~> 1.12"
  spec.add_development_dependency "rake", "~> 10.0"
end

Gemfile.lock

PATH
  remote: .
  specs:
    jekyll-sleek (0.1.8)
      jekyll (~> 3.8)
      jekyll-git_metadata (~> 0.2)
      jekyll-seo-tag (~> 2.5)
      jekyll-sitemap (~> 1.2)

GEM
  remote: https://rubygems.org/
  specs:
    addressable (2.5.2)
      public_suffix (>= 2.0.2, < 4.0)
    colorator (1.1.0)
    concurrent-ruby (1.1.4)
    em-websocket (0.5.1)
      eventmachine (>= 0.12.9)
      http_parser.rb (~> 0.6.0)
    eventmachine (1.2.7)
    ffi (1.9.25)
    forwardable-extended (2.6.0)
    http_parser.rb (0.6.0)
    i18n (0.9.5)
      concurrent-ruby (~> 1.0)
    jekyll (3.8.5)
      addressable (~> 2.4)
      colorator (~> 1.0)
      em-websocket (~> 0.5)
      i18n (~> 0.7)
      jekyll-sass-converter (~> 1.0)
      jekyll-watch (~> 2.0)
      kramdown (~> 1.14)
      liquid (~> 4.0)
      mercenary (~> 0.3.3)
      pathutil (~> 0.9)
      rouge (>= 1.7, < 4)
      safe_yaml (~> 1.0)
    jekyll-git_metadata (0.2.0)
      jekyll (~> 3.0)
    jekyll-sass-converter (1.5.2)
      sass (~> 3.4)
    jekyll-seo-tag (2.5.0)
      jekyll (~> 3.3)
    jekyll-sitemap (1.2.0)
      jekyll (~> 3.3)
    jekyll-watch (2.1.2)
      listen (~> 3.0)
    kramdown (1.17.0)
    liquid (4.0.1)
    listen (3.1.5)
      rb-fsevent (~> 0.9, >= 0.9.4)
      rb-inotify (~> 0.9, >= 0.9.7)
      ruby_dep (~> 1.2)
    mercenary (0.3.6)
    pathutil (0.16.2)
      forwardable-extended (~> 2.6)
    public_suffix (3.0.3)
    rake (10.5.0)
    rb-fsevent (0.10.3)
    rb-inotify (0.10.0)
      ffi (~> 1.0)
    rouge (3.3.0)
    ruby_dep (1.5.0)
    safe_yaml (1.0.4)
    sass (3.7.2)
      sass-listen (~> 4.0.0)
    sass-listen (4.0.0)
      rb-fsevent (~> 0.9, >= 0.9.4)
      rb-inotify (~> 0.9, >= 0.9.7)

PLATFORMS
  ruby

DEPENDENCIES
  bundler (~> 1.12)
  jekyll-sleek!
  rake (~> 10.0)

BUNDLED WITH
   1.16.1

.drone.yml:

- name: build-deploy-master
  pull: default
  image: ruby
  commands:
  - bundle install
  - bundle exec jekyll build --verbose --destination /deploy
  environment:
    BUNDLE_PATH: /drone/.bundle
    LANG: C.UTF-8
  volumes:
  - name: deploy
    path: /deploy
  when:
    branch:
    - master

Thank you very much :slight_smile:

What version of Ruby are you using?