Repair building docs (#1044)

Author: densmirn

.github/workflows/build-sphinx.yml

@@ -45,7 +45,8 @@ jobs:
         uses: conda-incubator/setup-miniconda@v2
         with:
           activate-environment: dpnp
-          python-version: 3.7
+          python-version: 3.8
+          channels: intel,conda-forge
           auto-activate-base: false
       - name: Conda info
         shell: bash -l {0}
@@ -55,22 +56,26 @@ jobs:
       - name: Install sphinx dependencies
         shell: bash -l {0}
         run: |
-          conda install numpy cython sphinx sphinx_rtd_theme wheel
+          conda install sphinx sphinx_rtd_theme
+      - name: Install dpnp dependencies
+        shell: bash -l {0}
+        run: |
+          conda install dpctl mkl-devel-dpcpp tbb-devel dpcpp_linux-64 cmake=3.19 cython pytest \
+                        -c dppy/label/dev -c intel -c conda-forge
       - name: Install cuPy dependencies
         shell: bash -l {0}
         run: |
           conda install -c conda-forge cupy cudatoolkit=10.0
       - name: Build library
         shell: bash -l {0}
         run: |
-          . /opt/intel/oneapi/setvars.sh
-          . ./scripts/install_cmake_lin.sh
-          ./0.build.sh
+          python setup.py build_clib
+          CC=dpcpp python setup.py build_ext --inplace
+          python setup.py develop
       - name: Build docs
         shell: bash -l {0}
         run: |
-          . /opt/intel/oneapi/setvars.sh
-          ./0.builddoc.sh
+          make html
         working-directory: doc
       # https://github.com/marketplace/actions/doxygen-action
       - name: Build backend docs