# Specify Settings for OpenBLAS Conda Package install?

**URL:** <https://forum.anaconda.com/t/specify-settings-for-openblas-conda-package-install/57331>\
**Category:** Product Help\
**Created:** [June 22, 2023, 11:41pm UTC](https://forum.anaconda.com/t/specify-settings-for-openblas-conda-package-install/57331 "2023-06-22T23:41:57Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Vivek\_Bharadwaj](https://avatars.discourse-cdn.com/v4/letter/v/f5a800/32.png) [@Vivek\_Bharadwaj](https://forum.anaconda.com/u/Vivek_Bharadwaj)\
**Post date:** [June 22, 2023, 11:41pm UTC](https://forum.anaconda.com/t/specify-settings-for-openblas-conda-package-install/57331/1 "2023-06-22T23:41:57Z")

</div>

An application I’m writing involves a Python front-end with a C++ backend with Pybind11 to bind the two together. I rely on OpenBLAS at the C++ layer, but I need it installed in sequential mode without internal thread parallelization (I have several loops parallelized with OpenMP that make BLAS calls, and I don’t want the internal threading to conflict with the threading of the outer loop; these BLAS calls are sufficiently small that I would get no benefit with the internal parallelism anyway.

I can do this if I install OpenBLAS from scratch based on the Github repo using the flag USE\_OPENMP=0 passed to cmake. Is it possible to specify such settings when installing a conda package?