diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index ec87803de..91c7d301a 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -1,20 +1,18 @@
-FROM docker.io/fpco/stack-build:lts-18.0
+FROM devfra.azurecr.io/de.fraport.build/haskell:8.10.4
 
-# add public key for nvidia cuda repositories
-RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A4B469963BF863CC
-
-ENV LANG=en_US.UTF-8
+ENV LANG=de_DE.UTF-8
 
 # compile-time dependencies
+RUN apt-get -y update && apt-get install -y libpq-dev libsodium-dev
 # RUN apt-get -y update && apt-get -y install llvm
 # RUN apt-get -y update && apt-get -y install g++ libghc-zlib-dev libpq-dev libsodium-dev pkg-config
 # RUN apt-get -y update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends tzdata
-# RUN apt-get -y update && apt-get -y install locales locales-all
+RUN apt-get -y update && apt-get install -y --no-install-recommends locales locales-all
 
 # run-time dependencies for uniworx binary
-# RUN apt-get -y update && apt-get -y install fonts-roboto
+RUN apt-get -y update && apt-get -y install fonts-roboto
 # RUN apt-get -y update && apt-get -y install pdftk
-# RUN apt-get -y update && apt-get -y install texlive-base luatex
+RUN apt-get -y update && apt-get -y install texlive-latex-recommended texlive-luatex texlive-plain-generic texlive-lang-german texlive-lang-english
 
 # locally these two should be identical, so that compilation results are written out into the file dir.
 # in CI-pipelines these two should be different, so that the container caches the compilation results.