diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a119981..265bb25 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,23 +3,7 @@ on: [push, pull_request, workflow_dispatch]
 jobs:
   setup:
     name: "Setup"
-    runs-on: ubuntu-18.04
-    container: ubuntu-20.04
+    runs-on: ubuntu-20.04
     steps:
-      - id: checkout
-        uses: actions/checkout@v2
-      - id: cache
-        uses: actions/cache@v2
-        with:
-          path: ~/.ccache
-          key: ubuntu-20.04-${{github.ref}}-${{github.sha}}
-          restore-keys: |
-            ubuntu-20.04-refs/heads/master-
-      - id: install_deps
-        run: |
-          which ccache
-          cmake --version
-          sudo apt install ccache
-          echo "::set-env name=PATH::/usr/lib/ccache:$PATH"
-      - id: build
-        run: g++ -c main.cpp
+      - id: dummy
+        run: echo "${{github.ref}}-${{github.sha}}"