This patch explicitly adds numexpr as part of the conda installation to avoid cases where the pip version is installed instead (in particular, when the default conda channel is set to conda-forge). The latest pip version of the package requires the glibc 2.27, which is not available in the current CentOS 7 installation and the source package is written in C++, but the compiler is also not available by default in the current installation.
This patch explicitly adds numexpr as part of the conda installation to avoid cases where the pip version is installed instead (in particular, when the default conda channel is set to conda-forge). The latest pip version of the package requires the glibc 2.27, which is not available in the current CentOS 7 installation and the source package is written in C++, but the compiler is also not available by default in the current installation.