From 00499d3d7b722a47a0956325e5938904c3414902 Mon Sep 17 00:00:00 2001
From: Patrick Shriwise <pshriwise@gmail.com>
Date: Thu, 15 Aug 2024 14:15:02 -0500
Subject: [PATCH] Death to conda, long live mamba

---
 .github/environment.yml  |  8 ++++++++
 .github/workflows/ci.yml | 16 +++++++++-------
 2 files changed, 17 insertions(+), 7 deletions(-)
 create mode 100644 .github/environment.yml

diff --git a/.github/environment.yml b/.github/environment.yml
new file mode 100644
index 0000000..6a7c6d4
--- /dev/null
+++ b/.github/environment.yml
@@ -0,0 +1,8 @@
+name: test-env
+channels:
+    - conda-forge
+dependencies:
+  - python>=3.8
+  - numpy
+  - pytest
+  - openmc==0.15.0
\ No newline at end of file
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6cb6a66..9a12409 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,17 +15,19 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Conda
-        uses: conda-incubator/setup-miniconda@v3
-        with:
-          auto-activate-base: true
-          activate-environment: ""
+     - uses: mamba-org/setup-micromamba@v1
+       with:
+         environment-file: .github/environment.yml
+         init-shell: >-
+           bash
+           powershell
+         cache-environment: true
+         post-cleanup: 'all'
 
       - name: Install OpenMC
         shell: bash
         run: |
-          conda config --add channels conda-forge
-          conda install -c conda_forge openmc==0.15.0
+          mamba install -c conda_forge openmc==0.15.0
 
       - name: Clone OpenMC
         run: |