Ubuntu needs pkg-config
FROM ubuntu:18.04 as builder
MAINTAINER Sean Young <sean@mess.org>
RUN apt-get update
-RUN apt-get install -y cargo llvm-8-dev clang-8 libz-dev
+RUN apt-get install -y cargo llvm-8-dev clang-8 libz-dev pkg-config
COPY src src/src/
COPY stdlib src/stdlib/
