Dockerfile

FROM debian:stretch

ARG UID=1000
ENV DEBIAN_FRONTEND=noninteractive
ENV TARGETDIR="/home/builder/target"

RUN apt-get update \
    && apt-get install -y \
        build-essential \
        curl \
        wget \
    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
 && useradd -m -u $UID builder

USER builder
WORKDIR /home/builder
RUN wget https://gist.githubusercontent.com/leophys/4409d02d68e1db0b5e651204eb89ad9d/raw/300057e89223b85684b796599a35657df54df1f7/build-tmux.sh \
 && chmod +x build-tmux.sh

ENTRYPOINT ["/home/builder/build-tmux.sh"]
CMD ["1"]

To build a static-linked version of tmux in a container (to obtain a portable version of tmux).

Build the image

docker build -t tmux-builder .

Compile with

First create a target directory on your host

mkdir target

Then run the build, mounting the target directory on the container

docker run -v $PWD/target:/home/builder/target tmux-builder

If you want to speed things up, append an integer roughly the number of your cpus at the end of the previous command.