diff --git a/.github/actions/setup-env-build/action.yml b/.github/actions/setup-env-build/action.yml
new file mode 100644
index 00000000..57702712
--- /dev/null
+++ b/.github/actions/setup-env-build/action.yml
@@ -0,0 +1,158 @@
+name: Install env + build
+inputs:
+  arch:
+    description: 'GPU architecture'
+    required: true
+  python:
+    description: 'Python version'
+    required: false
+    default: "3.11"
+  cuda:
+    description: 'CUDA version'
+    required: false
+    default: "11.8"
+  pytorch_version:
+    description: 'PyTorch version'
+    default: "2"
+  pytorch_channel:
+    description: 'PyTorch channel on conda'
+    default: "pytorch"
+
+runs:
+  using: composite
+  steps:
+    - name: Cleanup
+      shell: bash
+      run: rm -f ~/.profile ~/.bashrc
+    - id: prepare_conda_env_paths
+      shell: python
+      run: |
+        import os
+        import subprocess
+        import hashlib
+        import glob
+        import datetime
+        from pathlib import Path
+
+        CONDA_INSTALL_CMD = "micromamba create python=${{ inputs.python }} zlib pip ninja pytorch=${{ inputs.pytorch_version }} ccache=4.8 pytorch-mutex==1.0=cuda pytorch-cuda=${{ inputs.cuda }} -c ${{ inputs.pytorch_channel }} -c nvidia -c conda-forge -q -y"
+
+        conda_env_key = CONDA_INSTALL_CMD
+        for file in sorted(glob.glob("requirement*.txt")):
+          conda_env_key += f"\n########## {file}\n"
+          conda_env_key += Path(file).read_text()
+        if "${{ inputs.pytorch_channel }}" != "pytorch":
+          # Nightly or Test, update every week
+          conda_env_key += datetime.date.today().strftime("%Y-week%W") + "\n"
+        conda_env_hash = hashlib.sha224(conda_env_key.encode("ascii")).hexdigest()[:8]
+        shared_dir = os.environ.get("GHRUNNER_SHARED_DIR", os.getcwd())
+        env_path = os.path.join(shared_dir, "tmp", os.environ["GITHUB_RUN_ID"])
+        final_env = Path(shared_dir) / f"env_{conda_env_hash}.txt"
+        pkg_dir = Path(shared_dir) / "pkgs"
+        (Path(shared_dir) / f"env_{conda_env_hash}_content.txt").write_text(conda_env_key)
+        CONDA_INSTALL_CMD += " -p " + env_path
+        env_already_built = False
+        # If environment is already built
+        if final_env.is_file():
+          final_env_link = final_env.read_text().strip()
+          if (Path(final_env_link) / "bin" / "python").is_file():
+            print("Found valid env - skipping env setup")
+            CONDA_INSTALL_CMD = "true"
+            env_already_built = True
+            env_path = final_env_link
+          else:
+            print("Invalid env")
+        with open(os.environ['GITHUB_ENV'], "r+") as fp:
+            fp.write("CONDA_ENV_LINK=" + str(final_env) + "\n")
+            fp.write("CONDA_PREFIX=" + env_path + "\n")
+            fp.write("CONDA_PKGS_DIRS=" + str(pkg_dir) + "\n")
+            fp.write("CONDA_INSTALL_CMD=" + CONDA_INSTALL_CMD + "\n")
+            fp.write("CONDA_ENV_HASH=" + conda_env_hash + "\n")
+            fp.write("PY=" + os.path.join(env_path, "bin", "python") + "\n")
+            fp.write("PIP=" + os.path.join(env_path, "bin", "pip") + "\n")
+        with open(os.environ['GITHUB_OUTPUT'], "r+") as fp:
+          fp.write(f"ENV_CACHED={int(env_already_built)}\n")
+    - name: Print conda commands
+      shell: bash -l {0}
+      run: |
+        echo "CONDA_PREFIX=$CONDA_PREFIX"
+        echo "CONDA_INSTALL_CMD=$CONDA_INSTALL_CMD"
+        echo "CONDA_ENV_HASH=$CONDA_ENV_HASH"
+        echo "PY=$PY"
+    - name: Install micromamba
+      shell: bash -l {0}
+      run: |
+        set -ex
+        curl -Ls https://micro.mamba.pm/api/micromamba/linux-64/latest | tar -xvj bin/micromamba
+        echo "eval \"\$($(pwd)/bin/micromamba shell hook --shell bash)\"" >> ~/.profile
+    - name: Conda/pip setup
+      shell: bash -l {0}
+      if: steps.prepare_conda_env_paths.outputs.ENV_CACHED == 0
+      run: |
+        set -ex
+        micromamba config set channel_priority strict
+        # Retry if failed after removing downloaded packages cache
+        $CONDA_INSTALL_CMD || (rm -rf $CONDA_PKGS_DIRS && rm -rf $CONDA_PREFIX && $CONDA_INSTALL_CMD)
+        $PY -m pip install cmake
+        $PY -m pip install -r requirements-benchmark.txt --progress-bar off
+    - name: Activate environment
+      shell: bash -l {0}
+      run: |
+        echo "micromamba activate $CONDA_PREFIX" >> ~/.profile
+        echo "==== .profile ====="
+        cat ~/.profile
+    - run: which python
+      shell: bash -l {0}
+    - name: Setup ccache nvcc
+      shell: bash -l {0}
+      if: steps.prepare_conda_env_paths.outputs.ENV_CACHED == 0
+      run: |
+        echo "#!/bin/bash" > $CONDA_PREFIX/bin/nvcc-ccache
+        echo "ccache ${CUDA_HOME}/bin/nvcc \"\$@\"" >> $CONDA_PREFIX/bin/nvcc-ccache
+        cat $CONDA_PREFIX/bin/nvcc-ccache
+        chmod +x $CONDA_PREFIX/bin/nvcc-ccache
+        which nvcc
+        ccache --version
+
+    - name: Setup ccache g++
+      shell: bash -l {0}
+      if: steps.prepare_conda_env_paths.outputs.ENV_CACHED == 0
+      run: |
+        echo "#!/bin/bash" > $CONDA_PREFIX/bin/g++-ccache
+        echo "ccache g++ \"\$@\"" >> $CONDA_PREFIX/bin/g++-ccache
+        cat $CONDA_PREFIX/bin/g++-ccache
+        chmod +x $CONDA_PREFIX/bin/g++-ccache
+        which g++-ccache
+
+    - name: Patch for https://github.com/pytorch/pytorch/issues/114962
+      shell: bash -l {0}
+      run: |
+        CPP_EXTENSIONS_PY=$(python -c "import torch.utils.cpp_extension; print(torch.utils.cpp_extension.__file__)")
+        echo "Patching $CPP_EXTENSIONS_PY"
+        sed -i "/generate-dependencies-with-compile/d" $CPP_EXTENSIONS_PY
+    - name: Check NVIDIA libs
+      shell: bash -l {0}
+      run: |
+        ldconfig -p | grep libcuda.so
+        ls /.singularity.d/libs/
+    - name: Mark env as ready
+      shell: bash -l {0}
+      if: steps.prepare_conda_env_paths.outputs.ENV_CACHED == 0
+      run: echo $CONDA_PREFIX > $CONDA_ENV_LINK
+    - name: Setup ccache
+      shell: bash -l {0}
+      run: |
+        export CCACHE_DIR=$GHRUNNER_SHARED_DIR/ccache
+        echo "CCACHE_DIR=$CCACHE_DIR" >> ${GITHUB_ENV}
+        mkdir -p $CCACHE_DIR
+        ccache -s
+    - name: Build
+      shell: bash -l {0}
+      run: |
+        PYTORCH_NVCC="$CONDA_PREFIX/bin/nvcc-ccache" CXX="g++-ccache" TORCH_CUDA_ARCH_LIST=${{ inputs.arch }} python -m pip install -v -e .
+    - name: Build info
+      run: |
+        printenv
+        python -m xformers.info
+        python xformers/_triton_version_fairinternal.py
+        ccache -s
+      shell: bash -l {0}
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 80d0ab3b..826485f1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,11 +14,13 @@ jobs:
       JUST_TESTRUN: 1
     steps:
     - uses: actions/checkout@v4
+      - name: Setup & build
+        uses: ./.github/actions/setup-env-build
+        with:
+          arch: 7.5
     - name: Build and run tests
       run: |-
-        # set -e
-        # export JUST_TESTRUN=1
-        # VARS_TO_PASS="-e PYTHON_VERSION -e BUILD_VERSION -e PYTORCH_VERSION -e CU_VERSION -e JUST_TESTRUN"
-        # docker run --gpus all  --ipc=host -v $(pwd):/remote -w /remote ${VARS_TO_PASS} ${TESTRUN_DOCKER_IMAGE} python3 ./packaging/build_conda.py
-        conda create --name env --yes --quiet conda-build
-        conda run --no-capture-output --name env python3 ./packaging/build_conda.py
+        python -m unittest discover -v -s tests -t .
+
+        #conda create --name env --yes --quiet conda-build
+        #conda run --no-capture-output --name env python3 ./packaging/build_conda.py