diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index a6cb67b..41146f4 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -30,27 +30,18 @@ jobs:
           - {os: macOS-latest,   r: 'release', rtools: ''}
           - {os: windows-latest, r: 'release', rtools: ''}
 
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.head_ref }}
+      cancel-in-progress: true
+
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
       R_KEEP_PKG_SOURCE: yes
       NOT_CRAN: true
 
     steps:
-      - name: cmdstan env vars
-        run: |
-          echo "CMDSTAN_PATH=${HOME}/.cmdstan" >> $GITHUB_ENV
-        shell: bash
-
-      - uses: n1hility/cancel-previous-runs@v3
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-        if: "!startsWith(github.ref, 'refs/tags/') && github.ref != 'refs/heads/main'"
-
-      - uses: actions/checkout@v4
-
-
+      - uses: actions/checkout@v4 
       - uses: r-lib/actions/setup-pandoc@v2
-
       - uses: r-lib/actions/setup-r@v2
         with:
           r-version: ${{ matrix.config.r }}