[skip ci] bash shell

.github/workflows/building.yml

@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         # os: [ubuntu-18.04, macos-10.15, windows-latest]
-        os: [windows-latest]
+        os: [ubuntu-18.04, windows-latest]
         # python-version: [3.6, 3.7, 3.8, 3.9]
         python-version: [3.6]
         # torch-version: [1.8.0, 1.9.0]
@@ -63,10 +63,12 @@ jobs:
       - name: Install main package with CUDA
         if: ${{ matrix.cuda-version != 'cpu' }}
         run: |
-          bash .github/workflows/cuda/${{ matrix.cuda-version }}-${{ runner.os }}-env.sh
+          source .github/workflows/cuda/${{ matrix.cuda-version }}-${{ runner.os }}-env.sh
           pip install -e .
         env:
           FORCE_CUDA: 1
+        shell:
+          bash
 
       - name: Build wheel
         run: |