diff --git a/.github/actions/build_conda/action.yml b/.github/actions/build_conda/action.yml
index 9f2f8d5f44..21551f17ba 100644
--- a/.github/actions/build_conda/action.yml
+++ b/.github/actions/build_conda/action.yml
@@ -1,4 +1,5 @@
 name: Build conda
+description: Build conda
 inputs:
   label:
     description: "Label"
@@ -23,12 +24,23 @@ inputs:
 runs:
   using: composite
   steps:
+    - name: Choose shell
+      shell: bash
+      id: choose_shell
+      run: |
+        # if runner.os != 'Windows' use bash
+        if [ "${{ runner.os }}" != "Windows" ]; then
+          echo "shell=bash" >> "$GITHUB_OUTPUT"
+        else
+          echo "shell=pwsh" >> "$GITHUB_OUTPUT"
+        fi
     - name: Setup miniconda
       uses: conda-incubator/setup-miniconda@v3.0.3
       with:
         python-version: '3.11'
         miniconda-version:  latest
     - name: Install conda build tools
+      shell: ${{ steps.choose_shell.outputs.shell }}
       run: |
         # conda config --set solver libmamba
         # conda config --set verbosity 3
@@ -36,39 +48,46 @@ runs:
         conda install -y -q conda-build
     - name: Enable anaconda uploads
       if: inputs.label != ''
+      shell: ${{ steps.choose_shell.outputs.shell }}
       run: |
         conda install -y -q anaconda-client
         conda config --set anaconda_upload yes
     - name: Conda build (CPU)
       if: inputs.label == '' && inputs.cuda == ''
+      shell: ${{ steps.choose_shell.outputs.shell }}
       working-directory: conda
       run: |
         conda build faiss --python 3.11 -c pytorch
     - name: Conda build (CPU) w/ anaconda upload
       if: inputs.label != '' && inputs.cuda == ''
+      shell: ${{ steps.choose_shell.outputs.shell }}
       working-directory: conda
       run: |
         conda build faiss --user pytorch --label ${{ inputs.label }} -c pytorch
     - name: Conda build (GPU)
       if: inputs.label == '' && inputs.cuda != '' && inputs.raft == ''
+      shell: ${{ steps.choose_shell.outputs.shell }}
       working-directory: conda
       run: |
         conda build faiss-gpu --variants '{ "cudatoolkit": "${{ inputs.cuda }}", "c_compiler_version": "${{ inputs.compiler_version }}", "cxx_compiler_version": "${{ inputs.compiler_version }}" }' \
             -c pytorch -c nvidia/label/cuda-${{ inputs.cuda }} -c nvidia
     - name: Conda build (GPU) w/ anaconda upload
       if: inputs.label != '' && inputs.cuda != '' && inputs.raft == ''
+      shell: ${{ steps.choose_shell.outputs.shell }}
       working-directory: conda
       run: |
         conda build faiss-gpu --variants '{ "cudatoolkit": "${{ inputs.cuda }}", "c_compiler_version": "${{ inputs.compiler_version }}", "cxx_compiler_version": "${{ inputs.compiler_version }}" }' \
             --user pytorch --label ${{ inputs.label }} -c pytorch -c nvidia/label/cuda-${{ inputs.cuda }} -c nvidia
     - name: Conda build (GPU w/ RAFT)
       if: inputs.label == '' && inputs.cuda != '' && inputs.raft != ''
+      shell: ${{ steps.choose_shell.outputs.shell }}
       working-directory: conda
       run: |
         conda build faiss-gpu-raft --variants '{ "cudatoolkit": "${{ inputs.cuda }}", "c_compiler_version": "${{ inputs.compiler_version }}", "cxx_compiler_version": "${{ inputs.compiler_version }}" }' \
             -c pytorch -c nvidia/label/cuda-${{ inputs.cuda }} -c nvidia -c rapidsai -c conda-forge
     - name: Conda build (GPU w/ RAFT) w/ anaconda upload
       if: inputs.label != '' && inputs.cuda != '' && inputs.raft != ''
+      shell: ${{ steps.choose_shell.outputs.shell }}
       working-directory: conda
       run: |
         conda build faiss-gpu-raft --variants '{ "cudatoolkit": "${{ inputs.cuda }}", "c_compiler_version": "${{ inputs.compiler_version }}", "cxx_compiler_version": "${{ inputs.compiler_version }}" }' \