diff --git a/.github/actions/build_conda/action.yml b/.github/actions/build_conda/action.yml
index 481fd5a61..8a0c2b226 100644
--- a/.github/actions/build_conda/action.yml
+++ b/.github/actions/build_conda/action.yml
@@ -45,7 +45,6 @@ runs:
         # Ensure starting packages are from conda-forge.
         conda list --show-channel-urls
         conda install -y -q "conda!=24.11.0,<25.7"
-        conda config --set solver libmamba
         conda install -y -q "conda-build=25.3.1" "liblief=0.14.1"
     - name: Enable anaconda uploads
       if: inputs.label != ''