diff --git a/.github/workflows/ESP32.yml b/.github/workflows/ESP32.yml
index 9c40e82..edb8073 100644
--- a/.github/workflows/ESP32.yml
+++ b/.github/workflows/ESP32.yml
@@ -140,11 +140,11 @@ jobs:
             MAKE_CMD="USER_C_MODULES=${{ github.workspace }}/src/micropython.cmake BOARD=$BOARD_NAME"
           fi
           if [ -n "${CAMERA_MODEL}" ]; then
-            make $MAKE_CMD CFLAGS_EXTRA="-DMP_CAMERA_MODEL_${CAMERA_MODEL}=1" all
+            make ${MAKE_CMD} CFLAGS_EXTRA="-DMP_CAMERA_MODEL_${CAMERA_MODEL}=1" all
           else
-            make $MAKE_CMD all
+            make ${MAKE_CMD} all
           fi
-          mv ~/micropython/ports/esp32/build-$BUILD_DIR/firmware.bin ~/${{ matrix.board }}.bin
+          mv ~/micropython/ports/esp32/build-${BUILD_DIR}/firmware.bin ~/${{ matrix.board }}.bin
 
       - name: Upload firmware artifact
         uses: actions/upload-artifact@v4