Fix binary builds with CUDA 9.2 on Windows (#2273)

* Fix binary builds with CUDA 9.2 on Windows

* Remove packages according to VC_YEAR

.circleci/config.yml

@@ -269,7 +269,7 @@ jobs:
             conda activate base
             conda install -yq conda-build "conda-package-handling!=1.5.0"
             packaging/build_conda.sh
-            rm /C/tools/miniconda3/conda-bld/win-64/vs2019*.tar.bz2
+            rm /C/tools/miniconda3/conda-bld/win-64/vs${VC_YEAR}*.tar.bz2
       - store_artifacts:
           path: C:/tools/miniconda3/conda-bld/win-64
       - persist_to_workspace:

.circleci/config.yml.in

@@ -269,7 +269,7 @@ jobs:
             conda activate base
             conda install -yq conda-build "conda-package-handling!=1.5.0"
             packaging/build_conda.sh
-            rm /C/tools/miniconda3/conda-bld/win-64/vs2019*.tar.bz2
+            rm /C/tools/miniconda3/conda-bld/win-64/vs${VC_YEAR}*.tar.bz2
       - store_artifacts:
           path: C:/tools/miniconda3/conda-bld/win-64
       - persist_to_workspace:

packaging/pkg_helpers.bash

@@ -249,6 +249,9 @@ setup_conda_pytorch_constraint() {
     export CONDA_PYTORCH_BUILD_CONSTRAINT="- pytorch==${PYTORCH_VERSION}${PYTORCH_VERSION_SUFFIX}"
     export CONDA_PYTORCH_CONSTRAINT="- pytorch==${PYTORCH_VERSION}${PYTORCH_VERSION_SUFFIX}"
   fi
+  if [[ "$OSTYPE" == msys && "$CU_VERSION" == cu92 ]]; then
+    export CONDA_CHANNEL_FLAGS="${CONDA_CHANNEL_FLAGS} -c defaults -c numba/label/dev"
+  fi
 }
 
 # Translate CUDA_VERSION into CUDA_CUDATOOLKIT_CONSTRAINT