diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5b63f43929fa815385cbc716c7450d3c1249d578..d7a22be44e208980283ed3cc50f6f0ef23844844 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -21,12 +21,10 @@ debian:
         matrix:
             - CODENAME: [jessie, stretch, buster]
     before_script:
-        - |
-            set -eux
-            . /etc/os-release
-            apt-get install -yq apt-transport-https ca-certificates curl
-            curl -sSL -o /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
-            echo "deb https://packages.sury.org/php/ $VERSION_CODENAME main" > /etc/apt/sources.list.d/php.list
+        - apt-get update -yqq
+        - apt-get install -yq apt-transport-https ca-certificates curl
+        - curl -sSL -o /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
+        - echo "deb https://packages.sury.org/php/ $CODENAME main" > /etc/apt/sources.list.d/php.list
 
 ubuntu:
     extends: .job