[ci] Prevent Python downgrading to pypy on Windows (#5197)

* Update test_windows.ps1 * Update .appveyor.yml * Update .appveyor.yml
microsoft · May 4, 2022 · b2383e2 · b2383e2
1 parent 924d337
commit b2383e2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/.ci/test_windows.ps1 b/.ci/test_windows.ps1
@@ -52,7 +52,7 @@ if ($env:TASK -eq "swig") {
 
 conda install -q -y -n $env:CONDA_ENV cloudpickle joblib matplotlib numpy pandas psutil pytest scikit-learn scipy ; Check-Output $?
 # python-graphviz has to be installed separately to prevent conda from downgrading to pypy
-conda install -q -y -n $env:CONDA_ENV python-graphviz ; Check-Output $?
+conda install -q -y -n $env:CONDA_ENV libxml2 python-graphviz ; Check-Output $?
 
 if ($env:TASK -eq "regular") {
   mkdir $env:BUILD_SOURCESDIRECTORY/build; cd $env:BUILD_SOURCESDIRECTORY/build