diff --git a/.azure-pipelines/linux-CI-nightly.yml b/.azure-pipelines/linux-CI-nightly.yml
index a2be2d330..c232ae702 100644
--- a/.azure-pipelines/linux-CI-nightly.yml
+++ b/.azure-pipelines/linux-CI-nightly.yml
@@ -73,16 +73,7 @@ jobs:
     displayName: 'install scikit-learn'
 
   - script: |
-      if [ '$(onnx.version)' == 'git' ]
-        then
-          git clone https://github.com/onnx/onnx.git --recursive
-          export ONNX_ML=1
-          cd onnx
-          python setup.py install
-          cd ..
-        else
-          pip install onnx$(onnx.version)
-      fi
+      pip install onnx$(onnx.version)
     displayName: 'install onnx'
 
   - script: |
diff --git a/.azure-pipelines/linux-conda-CI.yml b/.azure-pipelines/linux-conda-CI.yml
index 4c3e117f2..ddf61a814 100644
--- a/.azure-pipelines/linux-conda-CI.yml
+++ b/.azure-pipelines/linux-conda-CI.yml
@@ -277,7 +277,7 @@ jobs:
     displayName: 'onnx version'
 
   - script: |
-      pip install $(onnx.version) $(onnxrt.version) numpy$(numpy.version) scikit-learn$(sklearn.version)
+      pip install $(onnx.version) $(onnxrt.version) "numpy$(numpy.version)" scikit-learn$(sklearn.version)
     displayName: install onnxruntime, onnx, numpy, scikit-learn again  # to make sure the proper version is installed
 
   - script: |