Alternative attempt to trigger next branch builds

.gitlab-ci.yml

@@ -3,6 +3,7 @@ image: docker:latest
 stages:
 - test
 - build
+- build-next
 - build-test
 
 variables:
@@ -43,11 +44,12 @@ x86_64:build:
   only:
   - mysql
 
-x86_64:trigger:
+x86_64:build-next:
-  stage: build
+  stage: build-next
-  trigger:
+  script:
-    project: $CI_PROJECT_PATH
+  - curl -X POST -F token=${CI_JOB_TOKEN} -F ref=ext ${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/trigger/pipeline
-    branch: ext
+  only:
+  - mysql
 
 x86_64:build-test:
   stage: build-test