diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index befcff6798ac4ae32802a84471a3821014f32ca1..ec3214e6a0aaafbffa6fac3d00cb02aefc59a891 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,6 @@
-image: "debian"
-
 build:
     stage: build
+    image: debian
     before_script:
         - echo "deb http://deb.debian.org/debian stretch-backports main" >> /etc/apt/sources.list
         - apt update -qq
@@ -11,3 +10,9 @@ build:
     script:
         - ./bootstrap.sh
         - ninja -C build/
+
+nix:
+    stage: build
+    image: nixos/nix:latest
+    script:
+        - nix-build