Update .gitlab-ci.yml
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d0b8405..faa5ce5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,6 +17,8 @@
   UPDATE_SITE_PROD_TARGET_DIR:  "html/tools/aida_est"
   REPOSITORY_TO_COPY: "org.polarsys.chess.parent/releng/eu.fbk.tools.aida.chess.repository/target/repository"
 
+  SKIP: "false"
+
 stages:
 - build_sde
 - build_est
@@ -32,7 +34,7 @@
     stage: build_sde
     environment: staging
     script:
-    - "curl -X POST -F token=d1ce830095dc9201851e948eb160f4 -F ref=master https://gitlab.fbk.eu/api/v4/projects/393/trigger/pipeline"
+    - "curl -X POST -F token=d1ce830095dc9201851e948eb160f4 -F ref=master --form variables[SKIP]=true https://gitlab.fbk.eu/api/v4/projects/393/trigger/pipeline"
 
 est_build_test_job:
     only:
@@ -41,11 +43,14 @@
     stage: build_est
     environment: staging
     script:
-    - "curl -X POST -F token=951497a03a4073902aa28ab8d9c2d3 -F ref=master https://gitlab.fbk.eu/api/v4/projects/1159/trigger/pipeline"
+    - "curl -X POST -F token=951497a03a4073902aa28ab8d9c2d3 -F ref=master --form variables[SKIP]=true https://gitlab.fbk.eu/api/v4/projects/1159/trigger/pipeline"
 
 maven_build_and_test:
     only:
-    - master
+      refs:
+      - master
+      variables:
+      - $SKIP == "false"
     
     stage: test
     environment: staging