.NET Core Pipleines - PostBuild copy failing

[BoroDrummer]

I have the following PostBuild configuration in my project file to copy some libraries into my output directory:

<Target Name="PostBuild" AfterTargets="PostBuildEvent">
    <Exec Command="copy $(ProjectDir)Lib\* $(OutDir)" />
</Target> 

This works as expected on my dev machine, but I get the following build error in Pipelines:

error MSB3073: The command "copy /opt/atlassian/pipelines/agent/build/<PROJECT>/Lib/* bin/Debug/netcoreapp2.2/" exited with code 127.

Is there any way I can get this to work? 

[BoroDrummer · Accepted solution]

I realized the issue was due to the fact Pipelines runs on Linux and my dev machine was windows. The "copy" command is windows specific, so to fix the issue I changed the PostBuild event to use "cp" instead:

<Target Name="PostBuild" AfterTargets="PostBuildEvent">
    <Exec Command="cp $(ProjectDir)Lib\* $(ProjectDir)$(OutDir)" />
</Target>