diff --git a/backend/Dockerfile b/backend/Dockerfile
index b654aa309..7b8069f2f 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,20 +1,20 @@
-ARG FROM_IMG=docker.io/library/haskell
-ARG FROM_TAG=8.10.4
+ARG FROM_IMG=docker.io/library/debian
+ARG FROM_TAG=12.5
 
 FROM ${FROM_IMG}:${FROM_TAG}
 
 ENV LANG=de_DE.UTF-8
 
+# basic dependencies
+RUN apt-get -y update && apt-get -y install git
+RUN apt-get -y update && apt-get -y install haskell-stack
+RUN apt-get -y update && apt-get -y install llvm
+RUN apt-get -y update && apt-get install -y --no-install-recommends locales locales-all
+
 # compile-time dependencies
-RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
---mount=type=cache,target=/var/lib/apt,sharing=locked \
-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 --mount=type=cache,target=/var/cache/apt,sharing=locked \
---mount=type=cache,target=/var/lib/apt,sharing=locked \
-apt-get -y update && apt-get install -y --no-install-recommends locales locales-all
+RUN apt-get -y update && apt-get install -y libpq-dev libsodium-dev
+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-time dependencies for uniworx binary
 RUN apt-get -y update && apt-get -y install fonts-roboto