1 files changed, 1 insertions, 0 deletions
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5a53974..7092f75 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,7 @@
 image: ocaml/opam2:latest
 
 before_script:
+  - sudo apt-get install m4
   - opam init
   - eval `opam config env`
   - opam update