Update build.yml

.github/workflows/build.yml

@@ -32,7 +32,7 @@ jobs:
           echo export VisualStudioVersion="%VisualStudioVersion% " >> vars.sh
           echo export WSLcross=true >> vars.sh
           echo export WSLENV=$WSLENV:INCLUDE/w:LIB/w:LIBPATH/w >> vars.sh
-          echo "ABC=123" >> $env:GITHUB_ENV
+          echo "ABC=123" >> $GITHUB_ENV
       - name: Set up WSL
         uses: Vampire/setup-wsl@v1.2.0
         with:
@@ -41,7 +41,6 @@ jobs:
       - name: Build FFmpeg
         shell: wsl-bash {0}
         run: |
-          ./vars.sh
           echo $ABC
           echo $PATH
           cl.exe