tox.ini (local-conda): Use 'uname -m' to determine arch for installer

Author: Matthias Koeppe

tox.ini

@@ -541,10 +541,11 @@ setenv =
     local-conda:      PATH={env:CONDA_PREFIX}/bin:/usr/bin:/bin:/usr/sbin:/sbin
     local-conda:      CONDA_PKGS_DIRS={env:SHARED_CACHE_DIR}/conda_pkgs
     local-conda:      CONDA_OS=$(uname | sed 's/^Darwin/MacOSX/;')
+    local-conda:      CONDA_ARCH=$(uname -m)
     local-conda-forge:     CONDA_INSTALLER_URL_BASE=https://github.com/conda-forge/miniforge/releases/latest/download/
-    local-conda-forge:         CONDA_INSTALLER_FILE=Miniforge3-{env:CONDA_OS}-x86_64.sh
+    local-conda-forge:         CONDA_INSTALLER_FILE=Miniforge3-{env:CONDA_OS}-{env:CONDA_ARCH}.sh
     local-conda-miniconda: CONDA_INSTALLER_URL_BASE=https://repo.anaconda.com/miniconda/
-    local-conda-miniconda:     CONDA_INSTALLER_FILE=Miniconda3-latest-{env:CONDA_OS}-x86_64.sh
+    local-conda-miniconda:     CONDA_INSTALLER_FILE=Miniconda3-latest-{env:CONDA_OS}-{env:CONDA_ARCH}.sh
     local-conda:                  SETENV=. {env:CONDA_PREFIX}/bin/activate base
     local-conda-environment:          CONDA_SAGE_ENVIRONMENT=sage-build
     local-conda-environment:            CONDA_SAGE_ENVIRONMENT_DIR=