diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 17f347a..078f86a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@
 # use the official gcc image, based on debian
 # can use verions as well, like gcc:5.2
 # see https://hub.docker.com/_/gcc/
-image: gcc
+image: walberla/buildenv-ubuntu-clang
 
 build:
   stage: build
@@ -11,7 +11,7 @@ build:
   # before_script: 
   #   - apt update && apt -y install make autoconf 
   script: 
-    - make
+    - CC=clang CXX=clang++ make
   artifacts:
     paths:
       - tv_rename