try include the repo via env variable

Author: JackEdTaylor

.github/workflows/R-CMD-check.yaml

@@ -39,9 +39,16 @@ jobs:
           r-version: ${{ matrix.config.r }}
           http-user-agent: ${{ matrix.config.http-user-agent }}
 
-      - name: Configure R repositories
+      - name: Include custom repository
+        shell: bash
         run: |
-          Rscript -e 'options(repos = c(CRAN = "https://cloud.r-project.org", lexopsdata = "https://JackEdTaylor.github.io/lexopsdata"))'
+          cat > "$RUNNER_TEMP/repositories" <<'EOF'
+          ## name	URL	default
+          CRAN	https://cloud.r-project.org	true
+          lexopsdata	https://JackEdTaylor.github.io/lexopsdata	true
+          EOF
+
+          echo "R_REPOSITORIES=$RUNNER_TEMP/repositories" >> "$GITHUB_ENV"
 
 
       - uses: r-lib/actions/setup-r-dependencies@v2