The instructions for installing SymbiFlow found here state to download architecture definitions using the following command:

wget -qO- https://storage.googleapis.com/symbiflow-arch-defs-install/quicklogic-arch-defs-63c3d8f9.tar.gz | tar -xz -C $INSTALL_DIR/eos-s3/

However, upon doing this and attempting to build the examples, the following error is obtained.

(eos-s3) root@e28a048119eb:/test/symbiflow-examples/eos-s3# make -C btn_counter
make: Entering directory '/test/symbiflow-examples/eos-s3/btn_counter'
ql_symbiflow -compile -d ql-eos-s3 -P pd64 -v btn_counter.v -t top -p chandalar.pcf
make: ql_symbiflow: No such file or directory
make: *** [Makefile:10: all] Error 127
make: Leaving directory '/test/symbiflow-examples/eos-s3/btn_counter'

Poking around in $INSTALL_DIR/eos-s3/, it appears that the tarball is extracted to $INSTALL_DIR/eos-s3/quicklogic-arch-defs rather than $INSTALL_DIR/eos-s3/install as expected.

This issue doesn't exist with the xc7 architecture definitions because those have the files directly within the tarball whereas the eos-s3 tarball has the files within a directory within the tarball.

Several workarounds exist, but the one that is easiest for end users is to run the following:

rm -rf $INSTALL_DIR/eos-s3/install
mv $INSTALL_DIR/eos-s3/quicklogic-arch-defs/ $INSTALL_DIR/eos-s3/install/

On the maintainer side, the eos-s3 architecture definition tarball should be updated to omit the containing directory.