diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6182590..85aa7c5 100755
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -10,6 +10,7 @@ generate-root:
   stage: .pre
   script:
     - yum install -y glibc-devel
+    - yum install -y libnsl
     - source /cvmfs/sw.hsf.org/key4hep/setup.sh
     - mkdir -p build install
     - cd build