Fix doc build (meta-pytorch#15)

Summary: Pull Request resolved: meta-pytorch#15

Differential Revision: D85487438

Author: tanquer

.github/workflows/docs.yaml

@@ -35,22 +35,26 @@ jobs:
           which conda
       - name: Update pip
         shell: bash -l {0}
-        run: python -m pip install --upgrade pip
-      - name: Install pytorch
-        shell: bash -l {0}
-        run: pip install --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cu128
+        run:
       - name: Install Dependencies
         shell: bash -l {0}
         run: |
           set -eux
+          conda create -n venv python=3.12 -y
+          conda activate venv
+
+          python -m pip install --upgrade pip
+          pip install --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cu128
+
           conda install -y git
           conda install -y -c conda-forge glog==0.4.0 gflags fmt
           pip install cmake
           pip install -r docs/requirements.txt
-          export USE_NCCL=0
           export USE_NCCLX=0
           export USE_SYSTEM_LIBS=1
-          pip install .[dev] -v
+          pip install --no-build-isolation .[dev] -v
+
+          conda deactivate
       - name: Build Sphinx Docs
         shell: bash -l {0}
         working-directory: docs