[SKIP CI] fix env var handling

.drone.yml

@@ -9,8 +9,9 @@ steps:
     environment:
       CUPSRELEASE: "${DRONE_TAG##v}"
     commands:
-      - echo "XXXXXXXXXXXXXXXXXXX"
-      - echo ${CUPSRELEASE:-2.2.10}
+      - echo $CUPSRELEAS- echo $CUPSRELEASEE
+      - CUPSRELEASE=${CUPSRELEASE:-2.2.10}
+      - echo $CUPSRELEASE
       - wget https://github.com/apple/cups/releases/download/v${CUPSRELEASE:-2.2.10}/cups-${CUPSRELEASE:-2.2.10}-source.tar.gz
       - mkdir ./rpms
       - rpmbuild -ta --define "_rpmdir $(pwd)/rpms" --without libusb1 cups-${CUPSRELEASE:-2.2.10}-source.tar.gz