fix el8 builds

.drone.yml

@@ -27,6 +27,13 @@ platform:
   arch: amd64
 
 steps:
+  - name: build-el7
+    image: thegeeklab/rpmbuild:7
+    commands:
+      - source /drone/src/.drone.env
+      - rpmbuild -ba --without libusb1 --define "version_ $${CUPS_VERSION##v}" cups.spec
+      - ls -l /drone/src/dist/RPMS/x86_64/
+
   - name: build-el8
     image: thegeeklab/rpmbuild:8
     commands:
@@ -115,6 +122,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: 5a50892d1993ab7fdfbab90f5b66a3f665b9d9e9ffa058642c2b3970368f02f3
+hmac: e3a4496149a9d12470fe6ccf27240160f1a52e62320541e0828c1bc65e2696e1
 
 ...