Prevent path conflict in builds (#583)

Contributes to rapidsai/build-planning#54

Ensures that conda builds will fail in the presence of multiple packages with identical paths

Authors:
  - Jake Awe (https://github.com/AyodeAwe)
  - James Lamb (https://github.com/jameslamb)

Approvers:
  - Ajay Thorve (https://github.com/AjayThorve)
  - Ray Douglass (https://github.com/raydouglass)

URL: #583

ci/build_python.sh

@@ -22,6 +22,7 @@ sed -i "/^__git_commit__/ s/= .*/= \"${commit}\"/g" "${package_dir}/${package_na
 
 rapids-logger "Begin py build"
 
+conda config --set path_conflict prevent
 # TODO: Remove `--no-test` flag once importing on a CPU
 # node works correctly
 RAPIDS_PACKAGE_VERSION=${version} rapids-conda-retry mambabuild \