Can't pip install llama-index in fresh virtual environment running python 3.12.x -- potential issues with onnxruntime

Question

Attempts to install llama-index in a fresh virtual environment (using conda) returns the following:

conda create --name llm-3.12 python=3.12
pip install --upgrade pip
pip install llama-index (failed)
pip install llama-index --no-cache --force-reinstall (also failed, same error*)

ERROR: Cannot install llama-index-cli because these package versions have conflicting dependencies.

The conflict is caused by:
    llama-index-vector-stores-chroma 0.1.4 depends on onnxruntime<2.0.0 and >=1.17.0
    llama-index-vector-stores-chroma 0.1.3 depends on onnxruntime<2.0.0 and >=1.17.0
    llama-index-vector-stores-chroma 0.1.2 depends on onnxruntime<2.0.0 and >=1.17.0
    llama-index-vector-stores-chroma 0.1.1 depends on onnxruntime<2.0.0 and >=1.17.0

I do not have any version of onnxruntime installed. Attempting to install onnxruntime manually, using pip, fails:

ERROR: Could not find a version that satisfies the requirement onnxruntime (from versions: none)
ERROR: No matching distribution found for onnxruntime

Attempting to install llama-index in python 3.12. Cannot do so. Listed packages that are requirements (onnxruntime) are not currently available on pypi.