CI docs:build: get more reliable

https://gitlab.nic.cz/knot/knot-resolver/-/jobs/1626177

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 57be2eea7e52c91984c89bfde17b33aafef2447d..3de6834744cc9078b68c7b5d87ce0f0bd2fe97b6 100644 (file)
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -776,10 +776,10 @@ pkg:arch:
 docs:build:
   stage: build
   needs: []
+  image: $IMAGE_PREFIX/debian13-knot_3_5:$IMAGE_TAG
   script:
     - git submodule update --init --recursive
-    - pip3 install -U -r doc/requirements.txt
-    - pip3 install -U sphinx_rtd_theme
+    - pip3 install -r doc/requirements.txt
     - meson build_doc -Ddoc=enabled
     - ninja -C build_doc doc
   artifacts: