diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
new file mode 100644
index 0000000..df3a9c2
--- /dev/null
+++ b/.github/workflows/cd.yml
@@ -0,0 +1,28 @@
+name: Build the Ruby package
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code from repo
+      uses: actions/checkout@v3
+
+    - name: Log into GitHub Container Registry
+      uses: docker/login-action@v2
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Build devcontainer and build the package
+      uses: devcontainers/ci@v0.3
+      with:
+        imageName: ghcr.io/cfe-lab/gotoh_devcontainer
+        cacheFrom: ghcr.io/cfe-lab/gotoh_devcontainer
+        runCmd: cd /workspaces/gotoh/ruby && bash build_gem.bash
+        env: |
+          CFE_GOTOH_VERSION=${{ github.ref_name }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6789679..16155fe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,6 +22,13 @@ jobs:
         imageName: ghcr.io/cfe-lab/gotoh_devcontainer
         cacheFrom: ghcr.io/cfe-lab/gotoh_devcontainer
         runCmd: cd /workspaces/gotoh/ruby && rake test
+        env: |
+          CI=1
+          CI_COMMIT_REF=${{ github.ref_name }}
+          CI_COMMIT_SHA=${{ github.sha }}
+          CI_PIPELINE_ID=${{ github.run_id }}
+          CI_COMMIT_BRANCH=${{ github.ref_name }}
+          CI_PROJECT=${{ github.repository }}
 
     - name: Upload coverage reports to Codecov with GitHub Action
       uses: codecov/codecov-action@v5
diff --git a/ruby/test/templates/index.html.erb b/ruby/test/templates/index.html.erb
index 79f32f9..114bb94 100644
--- a/ruby/test/templates/index.html.erb
+++ b/ruby/test/templates/index.html.erb
@@ -15,8 +15,8 @@
         <h1>
             <%= title %></h1>
         <h3>
-        <small>CI Pipeline ID <%= ENV["CI_PIPELINE_ID"] %> from branch <%= ENV["CI_COMMIT_BRANCH"] %>@<%= ENV["CI_PROJECT_NAMESPACE"] %>/<%= ENV["CI_PROJECT_NAME"] %></small></br>
-        <small>Git Commit Hash <%= ENV["CI_COMMIT_SHA"] %> (<%= ENV["CI_COMMIT_SHORT_SHA"] %>)</small>
+        <small>CI Pipeline ID <%= ENV["CI_PIPELINE_ID"] %> from branch <%= ENV["CI_COMMIT_BRANCH"] %>@<%= ENV["CI_PROJECT"] %></small></br>
+        <small>Git Commit Hash <%= ENV["CI_COMMIT_SHA"] %></small>
         </h3>
         <p>
             Finished in <%= total_time_to_hms %>, <%= '%.2f tests/s' % (count / total_time) %>, <%= '%.2f assertions/s' % (assertions / total_time) %>
diff --git a/ruby/test/test_helper.rb b/ruby/test/test_helper.rb
index 95e30ce..a4b9a8b 100644
--- a/ruby/test/test_helper.rb
+++ b/ruby/test/test_helper.rb
@@ -12,10 +12,11 @@
 require 'minitest/autorun'
 require 'minitest/reporters'
 
-if ENV['CI_COMMIT_TAG']
-  run_id = ENV['CI_COMMIT_TAG']
-elsif ENV["CI"]
-  run_id = "#{ENV['CI_PIPELINE_ID']}-#{ENV['CI_COMMIT_SHORT_SHA']}"
+# if ENV['CI_COMMIT_REF']
+#   run_id = ENV['CI_COMMIT_REF']
+# elsif ENV["CI"]
+if ENV['CI_COMMIT_REF']
+  run_id = "#{ENV['CI_COMMIT_REF']} #{ENV['CI_PIPELINE_ID']}-#{ENV['CI_COMMIT_SHA']}"
 else
   run_id = "LOCALBUILD"
 end