diff --git a/.github/workflows/custom/before-install/action.yml b/.github/workflows/custom/before-install/action.yml
index 3778a28ca8..76158cf5df 100644
--- a/.github/workflows/custom/before-install/action.yml
+++ b/.github/workflows/custom/before-install/action.yml
@@ -8,8 +8,9 @@ runs:
         echo '_R_CHECK_PKG_SIZES_=FALSE' | tee -a $GITHUB_ENV
       shell: bash
 
-    - name: Install GLPK on macOS
+    - name: Install and use GLPK on macOS
       if: runner.os == 'macOS'
       run: |
         brew install glpk
+        echo -e 'CPPFLAGS = -I/opt/homebrew/include\nLDFLAGS = -L/opt/homebrew/lib' | tee ~/.R/Makevars
       shell: bash
diff --git a/configure b/configure
index 22fd44f48a..2734e45287 100755
--- a/configure
+++ b/configure
@@ -34,7 +34,7 @@ fi
 
 OBJECTS='${SOURCES} ${MINIGMPSOURCES}'
 
-if echo '#include <glpk.h>' | `"${R_HOME}/bin/R" CMD config CC` -E $CPPFLAGS - > /dev/null 2>&1; then
+if echo '#include <glpk.h>' | `"${R_HOME}/bin/R" CMD config CC` -E `"${R_HOME}/bin/R" CMD config CPPFLAGS` - > /dev/null 2>&1; then
   echo "Using installed GLPK"
   PKG_LIBS="$PKG_LIBS -lglpk"
 else