BUG/CI/BLD: Fix conda builds
BUG/CI/BLD: Fix conda builds

Author: Phillip Cloud <cpcloud@gmail.com>

Closes #1609 from cpcloud/conda-build and squashes the following commits:

d3458da3 [Phillip Cloud] Generalize paths
d267addd [Phillip Cloud] Try using SCRIPT to avoid an undefined jinja variable

cloudera/ibis,cpcloud/ibis,ibis-project/ibis,cloudera/ibis,cpcloud/ibis,ibis-project/ibis,ibis-project/ibis,ibis-project/ibis,cloudera/ibis,cpcloud/ibis,cpcloud/ibis