diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index eb6191d24c374bb7bfe0994a8cfb82a1b9209268..189aaf3a2dfc1f5e9710e7a58f5b0f357ecf8749 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,7 +5,7 @@ job:
     - echo "man-db man-db/auto-update boolean false" | debconf-set-selections
     - export DEBIAN_FRONTEND=noninteractive
     - apt-get -y update
-    - apt-get -y install python3-yaml
+    - apt-get -y install python3-yaml make
   script:
-    - python3 -c 'import yaml; import pprint; c = yaml.load(open("librem5-pipeline-definitions.yml")); pprint.pprint(c)'
+    - make check
 
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..f468ec7cc03260f94709ac8823adf50f263d922a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2 @@
+check:
+	python3 -c 'import yaml; import pprint; c = yaml.load(open("librem5-pipeline-definitions.yml")); pprint.pprint(c)'
diff --git a/librem5-pipeline-definitions.yml b/librem5-pipeline-definitions.yml
index 69be82a8f83f0d37cb518d7a33100fe99bd3acae..27bf9f86096a8890caa983abae51f1c90e86bfcc 100644
--- a/librem5-pipeline-definitions.yml
+++ b/librem5-pipeline-definitions.yml
@@ -5,6 +5,7 @@ variables:
   L5_ADD_SCRATCH_CI: 'true'
   L5_WORKING_DIR: $CI_PROJECT_DIR/debian/output
   L5_LINTIAN_OPTS: --suppress-tags bad-distribution-in-changes-file
+  L5_GIT_SUBMODULE_UPDATE: 'true'
 
 .l5-build-debian-package:
   image: ${L5_DOCKER_IMAGE}
@@ -15,12 +16,13 @@ variables:
     - echo "man-db man-db/auto-update boolean false" | debconf-set-selections
     - export DEBIAN_FRONTEND=noninteractive
     - apt-get -y update
-    - '[ "$L5_ADD_SCRATCH_CI" != "true" ] || apt-get -y install build-essential wget ca-certificates gnupg'
+    - '[ "$L5_ADD_SCRATCH_CI" != "true" ] || apt-get -y install build-essential wget ca-certificates gnupg git'
     - '[ "$L5_ADD_SCRATCH_CI" != "true" ] || echo "deb http://ci.puri.sm/ scratch librem5" > /etc/apt/sources.list.d/ci.list'
     - '[ "$L5_ADD_SCRATCH_CI" != "true" ] || wget -O- https://ci.puri.sm/ci-repo.key | apt-key add -'
     - apt-get -y update
     - apt-get -y build-dep .
   script:
+    - '[ "$L5_GIT_SUBMODULE_UPDATE" != "true" ] || git submodule update --recursive'
     - dpkg-buildpackage -b -uc -us
     - rm -rf "${L5_WORKING_DIR}"; mkdir -p "${L5_WORKING_DIR}"
     - cp -l ../*.deb ../*.changes ../*.buildinfo "${L5_WORKING_DIR}/"