diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 280befb89b82c49fa9784a4ff12bc6435be2169c..4080e77fcfb5df7f5895a941fb394b5768dd924f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -102,7 +102,8 @@ spack:install_compilers:
       --use-cache
       ${COMPILER_LIST_SPECS}
 
-    - echo 'definitions: [ compilers: [' ${COMPILER_LIST_SPECS} ']]' > compiler_definitions.yaml
+    - |
+      echo 'definitions: [ compilers: [' ${COMPILER_LIST_SPECS} ']]' > compiler_definitions.yaml
 
     - /spack/spack/bin/spack compiler find --scope site /usr