diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index 0f65f50..6a072f8 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -29,6 +29,7 @@ jobs:
       - name: Build and test
         run: |
           pip install -e .
-          pip install asv virtualenv
+          mamba install libmambapy
+          pip install -U git+https://github.com/airspeed-velocity/asv.git@main
           asv machine --yes
           asv run --quick --dry-run
diff --git a/asv.conf.json b/asv.conf.json
index a5a545a..20f259f 100644
--- a/asv.conf.json
+++ b/asv.conf.json
@@ -4,7 +4,7 @@
     "project_url": "http://github.com/HaoZeke/asv_builder_examples",
     "repo": ".",
     "branches": ["main"],
-    "environment_type": "conda",
+    "environment_type": "mamba",
     "matrix": {
         "req": {
             "numpy": ["", null],