diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9cac550c6ef0134d4a01cf725518f2f703184573..c2dcbe63b9c4eaa1ac34dfc26964c5ff23210556 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -18,7 +18,7 @@ workflow:
   stage: build
   script:
     # Install prerequisite for git-gui and gitk
-    - sudo echo "proxy=" >> /etc/yum.conf
+    - echo "proxy=" | sudo tee -a /etc/yum.conf
     - sudo yum -y install tcl-devel tk-devel
     # Install recent version of python required to build meson that is a requirement for building chain of git
     - curl -s -L -o python.zip https://gitlab.synchrotron-soleil.fr/software-control-system/devtools/python3/-/jobs/artifacts/${PYTHON_VERSION}/download?job=${PLATFORM}