diff --git a/.github/actions/setup-binary-builds/action.yml b/.github/actions/setup-binary-builds/action.yml
index a59527f19b..7521968523 100644
--- a/.github/actions/setup-binary-builds/action.yml
+++ b/.github/actions/setup-binary-builds/action.yml
@@ -144,6 +144,8 @@ runs:
             # For conda package host python version is irrelevant
             export PYTHON_VERSION=3.13
             export CONDA_EXTRA_PARAM=" python-freethreading -c conda-forge"
+            # Pin conda-solver for 3.13t build
+            conda install conda-libmamba-solver=24.1.0
           fi
 
           conda create \