Fix macos release target and linux arm release (#2802)

.github/actions/build-macos-release/action.yml

@@ -17,6 +17,8 @@ runs:
   steps:
     - name: Build Python package
       shell: bash -l {0}
+      env:
+        MACOSX_DEPLOYMENT_TARGET: ${{ inputs.macos-target }}
       run: |
         pip install build
         python setup.py clean --all
@@ -25,6 +27,8 @@ runs:
     - name: Build backend package
       if: ${{ inputs.build-backend }}
       shell: bash -l {0}
+      env:
+        MACOSX_DEPLOYMENT_TARGET: ${{ inputs.macos-target }}
       run: |
         python setup.py clean --all
         MLX_BUILD_STAGE=2 python -m build -w

.github/workflows/release.yml

@@ -65,14 +65,14 @@ jobs:
         uses: actions/upload-artifact@v5
         with:
           overwrite: true
-          name: linux-wheels-${{ matrix.python_version }}
+          name: linux-wheels-${{ matrix.python_version }}-${{ matrix.arch }}
           path: wheelhouse/mlx-*.whl
       - name: Upload CPU artifacts
         if: matrix.python_version == '3.10'
         uses: actions/upload-artifact@v5
         with:
           overwrite: true
-          name: mlx-cpu
+          name: mlx-cpu-${{ matrix.arch }}
           path: wheelhouse/mlx_cpu-*.whl
   
   build_mac_release:
@@ -208,7 +208,8 @@ jobs:
     steps:
       - uses: actions/download-artifact@v6
         with:
-          name: mlx-cpu
+          pattern: mlx-cpu-*
+          merge-multiple: true
           path: dist
       - name: Display structure of downloaded files
         run: ls -R dist