diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 9d0af3c..cc7bc37 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -36,3 +36,30 @@ jobs:
       - working-directory: pkgs/ruby
         name: cppcheck
         run: cppcheck --quiet --error-exitcode=1 --std=c99 --enable=warning,style,performance,portability .
+
+  cond:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.0
+      - name: dependencies
+        run: sudo apt-get --yes install
+      - name: autogen
+        run: ./autogen.sh
+      - name: configure
+        run: ./configure --without-all CFLAGS='-O3 -fPIC'
+      - name: make
+        run: make
+      - name: install
+        run: sudo make install
+      - working-directory: pkgs/ruby
+        name: bundle
+        run: bundle install
+      - working-directory: pkgs/ruby
+        name: compile
+        run: rake compile
+      - working-directory: pkgs/ruby
+        name: test & lint
+        run: rake