it turns out debian has just been updated

.gitlab-ci.yml

@@ -266,7 +266,7 @@ upload-client-packages:
     entrypoint: [""]
   stage: deploy
   script:
-    - ls -la $CI_PROJECT_DIR/linux_packages
+    - ls -la $CI_PROJECT_DIR/linux_packages/*/
   tags:
     - kubernetes-executor
   rules:

deploy/build_env/debians/Dockerfile.gitlab.11

@@ -12,13 +12,14 @@ RUN set -eux; \
 		python3-numpy \
 		python3-stdeb \
 		python3-pip \
+		dh-python \
 		zlib1g-dev \
 		fakeroot \
 		wget \
 	; \
 	apt-get install -y --no-install-recommends cmake/bullseye-backports; \
-	pip  --no-cache-dir install cython && pip3 --no-cache-dir install cython; \
+	pip3 --no-cache-dir install cython; \
 	rm -rf /var/lib/apt/lists/*
 
-ENV OS debian11.2
-ENV OS_FOLDER debian11.2
+ENV OS debian11.3
+ENV OS_FOLDER debian11.3