diff --git a/.github/workflows/r.yml b/.github/workflows/r.yml
index 016b2ef..82d4d18 100644
--- a/.github/workflows/r.yml
+++ b/.github/workflows/r.yml
@@ -42,7 +42,7 @@ jobs:
     - name: Set up R (latest version)
       uses: r-lib/actions/setup-r@v2
       with:
-        r-version: 'latest'
+        r-version: ${{ matrix.config.r }}
         
     # Install system dependencies required for R packages
     - name: Install system dependencies (Linux)
@@ -56,7 +56,6 @@ jobs:
       run: |
         brew update
         brew upgrade
-        brew install pkgconf
         brew install pandoc
 
     - name: Install Pandoc for Windows