Getting SymbiFlow

This section describes how to install SymbiFlow and set up a fully working environment to later build example designs.


To be able to follow through this tutorial, install the following software:

apt update -y
apt install -y git wget xz-utils

Next, clone the SymbiFlow examples repository and enter it:

git clone
cd symbiflow-examples

Toolchain installation

Now we are able to install the SymbiFlow toolchain. This procedure is divided into three steps:

  • installing the Conda package manager,

  • choosing an installation directory,

  • downloading the architecture definitions and installing the toolchain.


Download Conda installer script into the symbiflow-examples directory:

wget -O

Choose the install directory

The install directory can either be in your home directory such as ~/opt/symbiflow or in a system directory such as /opt/symbiflow. If you choose a system directory, you will need root permission to perform the installation, and so you will need to add some sudo commands to the instructions below.

export INSTALL_DIR=~/opt/symbiflow


Select your target FPGA family:

export FPGA_FAM=xc7

Next, setup Conda and your system’s environment:

bash -u -b -p $INSTALL_DIR/$FPGA_FAM/conda;
source "$INSTALL_DIR/$FPGA_FAM/conda/etc/profile.d/";
conda env create -f $FPGA_FAM/environment.yml

Download architecture definitions:

mkdir -p $INSTALL_DIR/xc7/install
wget -qO- | tar -xJC $INSTALL_DIR/xc7/install
wget -qO- | tar -xJC $INSTALL_DIR/xc7/install
wget -qO- | tar -xJC $INSTALL_DIR/xc7/install
wget -qO- | tar -xJC $INSTALL_DIR/xc7/install
wget -qO- | tar -xJC $INSTALL_DIR/xc7/install

If the above commands exited without errors, you have successfully installed and configured your working environment.

Build Example Designs

With the toolchain installed, you can build the example designs. The example designs are provided in separate directories:

  • xc7 directory for the Artix-7 devices

  • eos-s3 directory for the EOS S3 devices