update comment

rapidsai · Jun 18, 2024 · 706b0eb · 706b0eb
1 parent d4303c9
commit 706b0eb
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/ci/build_wheel_python.sh b/ci/build_wheel_python.sh
@@ -17,6 +17,9 @@ RAPIDS_PY_CUDA_SUFFIX="$(rapids-wheel-ctk-name-gen ${RAPIDS_CUDA_VERSION})"
 CPP_WHEELHOUSE=$(RAPIDS_PY_WHEEL_NAME="rmm_${RAPIDS_PY_CUDA_SUFFIX}" rapids-download-wheels-from-s3 cpp /tmp/librmm_dist)
 
 # ensure 'rmm' wheel builds always use the 'librmm' just built in the same CI run
+#
+# using env variable PIP_CONSTRAINT is necessary to ensure the constraints
+# are used when created the isolated build environment
 echo "librmm-${RAPIDS_PY_CUDA_SUFFIX} @ file://$(echo ${CPP_WHEELHOUSE}/librmm_${RAPIDS_PY_CUDA_SUFFIX}*.whl)" > ./build-constraints.txt
 
 PIP_CONSTRAINT="${PWD}/build-constraints.txt" \