diff --git a/.github/workflows/build_wheels_linux.yml b/.github/workflows/build_wheels_linux.yml
index 147323f5cb..075c81ffdc 100644
--- a/.github/workflows/build_wheels_linux.yml
+++ b/.github/workflows/build_wheels_linux.yml
@@ -201,7 +201,12 @@ jobs:
           # when using Python version, less than the conda latest
           ###############################################################################
           echo 'Installing conda-forge'
-          curl -L -o /mambaforge.sh https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-Linux-aarch64.sh
+          # Pin the installer. The shared setup-binary-builds action installs
+          # conda=25.3.0 into this base env, and conda 25.3.0 has no Python 3.14
+          # build. Miniforge releases newer than this one put the base env on
+          # Python 3.14, which makes that install unsatisfiable and fails every
+          # aarch64 wheel build. Bump this tag only together with that pin.
+          curl -fL -o /mambaforge.sh https://github.com/conda-forge/miniforge/releases/download/26.3.2-3/Miniforge3-Linux-aarch64.sh
           chmod +x /mambaforge.sh
           /mambaforge.sh -b -p /opt/conda
           rm /mambaforge.sh