diff --git a/appveyor.yml b/appveyor.yml
index 5451b4f..fe6d357 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -57,7 +57,7 @@ test_script:
 #  - cmd: choco install capnpc-csharp --source=".;https://chocolatey.org/api/v2" --force -y
   - cmd: choco install capnproto --source="https://chocolatey.org/api/v2" --force -y
   - cmd: cd %APPVEYOR_BUILD_FOLDER%\capnpc-csharp
-  - cmd: echo dotnet tool install --global --add-source ./nupkg capnpc-csharp --version > install.bat
+  - cmd: echo|set /p="dotnet tool install --global --add-source ./nupkg capnpc-csharp --version " > install.bat
   - cmd: nbgv get-version -v NuGetPackageVersion >> install.bat
   - cmd: install.bat
   - cmd: cd %APPVEYOR_BUILD_FOLDER%\install-test