diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3cdbd5d..c6e9563 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,23 @@
 build:lagarto-ox:
   stage: build
+  when: manual
   tags:
     - nix
   script:
     - nix develop -L .#lagarto-ox --command fpga/run-remotely.sh fpgalogin1:ci
+
+build:lagarto-ox-tarball:
+  stage: build
+  when: manual
+  tags:
+    - nix
+  script:
+    - nix build -L .#nixosConfigurations.lagarto-ox.pkgs.fpga-tarball
+    - cd result
+    - out=/ceph/home/gitlab-runner/public_html/nixos-riscv/
+    - fn=$(ls | head -1)
+    - cp $fn $out/$fn
+    - rm -f $out/latest.tar.gz
+    - ln -s $out/$fn $out/latest.tar.gz
+    - cd ..
+    - rm result