diff --git a/build/Dockerfile b/build/Dockerfile
index 6f9a8e2..a54e04a 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -1,14 +1,15 @@
-FROM golang:bookworm AS build
+# The build image could be golang, but it currently does not support riscv64. Only debian:sid does, at the time of writing.
+FROM debian:sid-slim AS build
 
 # Install dependencies
-RUN apt-get update && apt-get install -y libsecret-1-dev
+RUN apt-get update && apt-get install -y git golang build-essential libsecret-1-dev
 
 # Build
 WORKDIR /build/
 COPY build.sh VERSION /build/
 RUN bash build.sh
 
-FROM debian:bookworm-slim
+FROM debian:sid-slim
 LABEL maintainer="Simon Felding <sife@adm.ku.dk>"
 
 EXPOSE 25/tcp