Work in progress.
Dexed is a FM Synth Plugin (https://github.com/asb2m10/dexed) offering a standalone version you can download from their git releases. Executing their pre-compiled binary on my Linux machine I got the following error:
~/Downloads/dexed-0.9.4.lnx % ./Dexed  29833 illegal hardware instruction (core dumped) ./Dexed
Building Dexed from source solved the problem :)
This is a quick guide how to build it your self using docker.
FROM debian:latest RUN apt-get update RUN apt-get install -y git freeglut3-dev g++ libasound2-dev libcurl4-openssl-dev build-essential\ libfreetype6-dev libjack-jackd2-dev libx11-dev libxcomposite-dev \ libxcursor-dev libxinerama-dev libxrandr-dev mesa-common-dev && apt-get clean RUN git clone https://github.com/asb2m10/dexed.git RUN cd /dexed/Builds/Linux && \ make CONFIG=Release && \ install -Dm755 build/Dexed.so /usr/lib/vst/Dexed.so VOLUME /vol ENTRYPOINT ["/bin/cp","/dexed/Builds/Linux/build/Dexed", "/dexed/Builds/Linux/build/Dexed.so", "/vol"]
docker build . -t dexed.
docker run -v $(pwd)/dexed-bin:/vol dexed. This will copy the binaries built in the container to you local hard drive.
dexed-bindir of your current directory :)