wget https://github.com/jeetsukumaran/DendroPy/archive/v3.12.1.zip unzip v3.12.1.zip rm v3.12.1.zip ls DendroPy-3.12.1 -l dpydir=$(pwd)/DendroPy-3.12.1/dendropy # you can run this, but it might break things that use DendroPy 4.*: ln -s $dpydir ./pasta/dendropy # or you can run this every time you want to use PASTA export PYTHONPATH=$dpydir:$PYTHONPATH