diff --git a/build/fixtures/test_weekly.json b/build/fixtures/test_weekly.json
new file mode 100644
index 0000000..abc0537
--- /dev/null
+++ b/build/fixtures/test_weekly.json
@@ -0,0 +1,16 @@
+[
+{
+  "model": "build.buildrelease",
+  "pk": 1,
+  "fields": {
+    "uuid": "dbe569f7-eab6-4532-a6d1-d31fb559649b",
+    "start_date": "2017-07-14T07:55:11.714Z",
+    "tag": "",
+    "branch": "master",
+    "release": "release-trunk-weekly",
+    "distribution": "bullseye",
+    "projects": "asterisk-voicemail,backup-tools,bulk-processor,bulk-processor-projects,bootenv,cdr-exporter,cfg-schema,check-tools,cleanup-tools,cloudpbx-sources,csta-testsuite,data-hal,db-schema,deployment-iso,dhtest,documentation,faxserver,installer,kamailio,kamailio-config-tests,keyring,klish,libinewrate,libswrate,libtcap,license-client,lnpd,lua-ngcp-kamailio,mediator,megacli,metapackages,monitoring-tools,ngcp-admin-ui,ngcp-api-tools,ngcp-csc-ui,ngcp-exporter,ngcp-fauditd,ngcp-inventory,ngcp-js-api-client,ngcp-logfs,ngcp-klish-config,ngcp-panel,ngcp-prompts,ngcp-rest-api,ngcp-schema,ngcp-status,ngcp-sudo-plugin,ngcp-support,ngcp-user-framework,ngcp-web-tests-e2e,ngcpcfg,ngcpcfg-api,ngcpcfg-ha,ngrep-sip,prosody,pushd,py-ngcp-kamailio,rate-o-mat,reminder,rtpengine,sems,sems-pbx,sipwise-base,snmp-agent,system-tests,system-tools,templates,upgrade,vmnotify,voisniff-ng,websocket",
+    "built_projects": "release-copy-debs-yml,sipwise-base,data-hal,libswrate,libinewrate,libtcap,system-tools,ngcpcfg,check-tools,ngcp-schema,ngcp-panel,cdr-exporter,bootenv,backup-tools,asterisk-voicemail,bulk-processor-projects,cleanup-tools,bulk-processor,csta-testsuite,dhtest,deployment-iso,cloudpbx-sources,faxserver,db-schema,installer,keyring,cfg-schema,klish,license-client,mediator,lnpd,lua-ngcp-kamailio,kamailio-config-tests,metapackages,monitoring-tools,documentation,megacli,ngcp-api-tools,ngcp-fauditd,ngcp-exporter,ngcp-inventory,ngcp-admin-ui,kamailio,ngcp-js-api-client,ngcp-klish-config,ngcp-sudo-plugin,ngcp-status,ngcp-logfs,ngcp-user-framework,ngcp-support,ngcp-web-tests-e2e,ngcpcfg-api,ngcpcfg-ha,ngcp-rest-api,ngrep-sip,ngcp-csc-ui,pushd,prosody,reminder,rate-o-mat,py-ngcp-kamailio,snmp-agent,system-tests,rtpengine,vmnotify,voisniff-ng,sems,templates,sems-pbx,websocket,upgrade"
+  }
+}
+]
diff --git a/build/tasks.py b/build/tasks.py
index 6da47cd..845d363 100644
--- a/build/tasks.py
+++ b/build/tasks.py
@@ -18,6 +18,7 @@ from django.apps import apps
 
 from .conf import settings
 from .utils import trigger_build
+from .utils import trigger_build_matrix
 from .utils import trigger_copy_deps
 
 logger = structlog.get_logger(__name__)
@@ -93,4 +94,7 @@ def build_resume(pk):
             br.append_triggered(prj)
         else:
             log.debug("BuildRelease has no next")
+            if br.release == "release-trunk-weekly":
+                url = trigger_build_matrix()
+                log.info("build_matrix triggered", instance=str(br), url=url)
             break
diff --git a/build/test/test_tasks.py b/build/test/test_tasks.py
index 2f22eab..45b9173 100644
--- a/build/test/test_tasks.py
+++ b/build/test/test_tasks.py
@@ -262,3 +262,34 @@ class JBIManageTest(BaseTest):
         self.assertEqual(br.triggered_projects, "ngcp-schema")
         params["project"] = "ngcp-schema-get-code"
         tb.assert_called_with(**params)
+
+
+@override_settings(JBI_ALLOWED_HOSTS=["fake.local"])
+@patch("repoapi.utils.dlfile")
+@patch("build.tasks.trigger_build")
+@patch("build.tasks.trigger_build_matrix")
+class WeeklyTest(BaseTest):
+    fixtures = [
+        "test_weekly",
+    ]
+    release = "release-trunk-weekly"
+    release_uuid = "dbe569f7-eab6-4532-a6d1-d31fb559649b"
+
+    @override_settings(BUILD_POOL=2)
+    def test_jbi_manage_trigger_matrix(self, tbm, tb, dl):
+        br = BuildRelease.objects.get(uuid=self.release_uuid)
+        JenkinsBuildInfo.objects.create(
+            job_url="http://fake.local/job/ngcp-prompts-repos/",
+            projectname="ngcp-prompts",
+            jobname="ngcp-prompts-repos",
+            tag="UUIDA",
+            param_release=self.release,
+            param_release_uuid=self.release_uuid,
+            buildnumber=1,
+            result="SUCCESS",
+        )
+        br = BuildRelease.objects.get(pk=br.pk)
+        self.assertTrue(br.built_projects.endswith("ngcp-prompts"))
+        self.assertEqual(br.pool_size, 0)
+        tb.assert_not_called()
+        tbm.assert_called_once_with()
diff --git a/build/utils.py b/build/utils.py
index 9a32f5a..834ccc0 100644
--- a/build/utils.py
+++ b/build/utils.py
@@ -28,15 +28,13 @@ from repoapi.utils import open_jenkins_url
 
 logger = structlog.get_logger(__name__)
 
-base_url = (
-    "{base}/job/{job}/buildWithParameters?"
-    "token={token}&cause={cause}&uuid={uuid}&"
-    "release_uuid={release_uuid}"
-)
+_url = "{base}/job/{job}/buildWithParameters?" "token={token}&cause={cause}"
+base_url = _url + "&uuid={uuid}&release_uuid={release_uuid}"
 project_url = (
     base_url + "&branch={branch}&tag={tag}&release={release}&"
     "distribution={distribution}"
 )
+build_matrix_url = _url
 copy_deps_url = base_url + "&release={release}&internal={internal}"
 re_release = re.compile(r"^release-(mr[0-9]+\.[0-9]+(\.[0-9]+)?)$")
 re_release_common = re.compile(r"^(release-)?(mr[0-9]+\.[0-9]+)(\.[0-9]+)?$")
@@ -73,6 +71,21 @@ def get_common_release(version):
         return "master"
 
 
+def trigger_build_matrix():
+    params = {
+        "base": settings.JENKINS_URL,
+        "token": urllib.parse.quote(settings.JENKINS_TOKEN),
+        "job": "weekly-build-matrix-trunk-weekly",
+        "cause": "repoapi finished to build trunk-weekly",
+    }
+    url = _url.format(**params)
+    if settings.DEBUG:
+        logger.info("Debug mode, would trigger: %s", url)
+    else:
+        open_jenkins_url(url)
+    return "{base}/job/{job}/".format(**params)
+
+
 def trigger_copy_deps(release, internal, release_uuid, uuid=None):
     if release.startswith("release-trunk-"):
         simple = release