diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index 730d5a240..e74f98966 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -4,9 +4,9 @@ FROM devfra.azurecr.io/de.fraport.build/tools:1.1.0
 RUN grep ^ /etc/apt/sources.list /etc/apt/sources.list.d/*
 
 # compile-time dependencies
-RUN apt-get -y update && apt-get -y install haskell-stack git
-RUN apt-get -y update && apt-get -y install alex g++ happy libghc-zlib-dev libpq-dev libsodium-dev pkg-config
+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 -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