diff --git a/Dockerfile b/Dockerfile
index 00d8559..a6f8081 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ FROM debian:bullseye-slim as base
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 # TODO Remove when upstream Ruby works properly on Apple silicon
-RUN apt update && apt install -y build-essential wget autoconf libpq-dev
+RUN apt update && apt install -y build-essential wget autoconf libpq-dev pkg-config
 RUN wget https://github.com/postmodern/ruby-install/releases/download/v0.9.3/ruby-install-0.9.3.tar.gz \
   && tar -xzvf ruby-install-0.9.3.tar.gz \
   && cd ruby-install-0.9.3/ \