CI: install cmake since fast_html now requires it

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c9ab848926f21debe460cee18509380aefdc3ffb..66813c8140d1477e4b14c67e8ed02074d5b72584 100644 (file)
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -22,6 +22,7 @@ stages:
   - docker
 
 before_script:
+  - apt-get update && apt-get install -y cmake
   - mix local.hex --force
   - mix local.rebar --force