diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index dfef45e114520a85639efbf9406fb2792f17cbb6..e3e7fcc7279058aacb5b8546d158d70a583a47e5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -50,6 +50,10 @@ gcc_9_python:
     paths:
       - $BUILD_FOLDER
 
+  before_script:
+    - export CC=gcc
+    - export CXX=g++
+
   script:
     - $CXX --version
     - $CC --version