Try npm install instead.

Author: sean-mcmanus

Build/cg/cg.yml

@@ -109,6 +109,7 @@ extends:
 
         - script: |
             cd $(Build.SourcesDirectory)\Extension
-            npx --ignore-scripts=false @vscode/vsce@3.7.1 package --yarn -o $(Build.ArtifactStagingDirectory)\Extension\cpptools.vsix
+            npm install --ignore-scripts=false @vscode/vsce@3.7.1
+            npx @vscode/vsce@3.7.1 package --yarn -o $(Build.ArtifactStagingDirectory)\Extension\cpptools.vsix
           name: ProcessRunner_12
           displayName: Run VSCE to package vsix

Build/package/jobs_package_vsix.yml

@@ -61,11 +61,14 @@ jobs:
 
   - script: |
       cd $(Build.SourcesDirectory)\${{ parameters.srcDir }}
-      npx --ignore-scripts=false @vscode/vsce@3.7.1 package -o $(Build.ArtifactStagingDirectory)\vsix\${{ parameters.vsixName }}.vsix
+      npm install --ignore-scripts=false @vscode/vsce@3.7.1
+      npx @vscode/vsce@3.7.1 package -o $(Build.ArtifactStagingDirectory)\vsix\${{ parameters.vsixName }}.vsix
     displayName: Run VSCE to package vsix
 
 # sign the vsix
-  - script: npx --ignore-scripts=false @vscode/vsce@3.7.1 generate-manifest -i $(Build.ArtifactStagingDirectory)\vsix\${{ parameters.vsixName }}.vsix -o $(Build.ArtifactStagingDirectory)\vsix\${{ parameters.vsixName }}.manifest
+  - script: |
+      npm install --ignore-scripts=false @vscode/vsce@3.7.1
+      npx @vscode/vsce@3.7.1 generate-manifest -i $(Build.ArtifactStagingDirectory)\vsix\${{ parameters.vsixName }}.vsix -o $(Build.ArtifactStagingDirectory)\vsix\${{ parameters.vsixName }}.manifest
     displayName: generate manifest
     workingDirectory: $(Build.SourcesDirectory)\${{ parameters.srcDir }}
   - script: copy $(Build.ArtifactStagingDirectory)\vsix\${{ parameters.vsixName }}.manifest $(Build.ArtifactStagingDirectory)\vsix\${{ parameters.vsixName }}.signature.p7s

Build/publish/jobs_publish_vsix.yml

@@ -32,7 +32,8 @@ jobs:
         Write-Host "##vso[task.setvariable variable=AAD_TOKEN;issecret=true]$aadToken"
 
   - script: |
-      npx --ignore-scripts=false @vscode/vsce@3.7.1 publish --skip-duplicate -i $(Build.StagingDirectory)\vsix\${{ parameters.vsixName }}.vsix --manifestPath $(Build.StagingDirectory)\vsix\${{ parameters.vsixName }}.manifest --signaturePath $(Build.StagingDirectory)\vsix\${{ parameters.vsixName }}.signature.p7s
+      npm install --ignore-scripts=false @vscode/vsce@3.7.1
+      npx @vscode/vsce@3.7.1 publish --skip-duplicate -i $(Build.StagingDirectory)\vsix\${{ parameters.vsixName }}.vsix --manifestPath $(Build.StagingDirectory)\vsix\${{ parameters.vsixName }}.manifest --signaturePath $(Build.StagingDirectory)\vsix\${{ parameters.vsixName }}.signature.p7s
     displayName: Publish to Marketplace
     env:
       VSCE_PAT: $(AAD_TOKEN)