There is an incompatible JNA native library installed on this system

[eed3si9n]

steps

1. Remove JNA dependency from sbt/sbt.
2. Run scripted tests on AppVeyor.

See https://ci.appveyor.com/project/eed3si9n/sbt

problem

I got the following on the first test:

Running actions / add-alias
[error] java.lang.Error: 
[error] 
[error] There is an incompatible JNA native library installed on this system
[error] Expected: 5.2.0
[error] Found:    3.2.1
[error] C:\jdk8\bin;C:\windows\Sun\Java\bin;C:\windows\system32;C:\windows;C:\jdk8\bin;C:\sbt\sbt\bin;C:\jdk8\bin;C:\nodejs\bin;C:\Perl\site\bin;C:\Perl\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\7-Zip;C:\Program Files\Microsoft\Web Platform Installer\;C:\Tools\GitVersion;C:\Tools\PsTools;C:\Program Files\Git LFS;C:\Program Files (x86)\Subversion\bin;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\110\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\Tools\Binn\ManagementStudio\;C:\Tools\WebDriver;C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.4\;C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SDKs\Azure\CLI\wbin;C:\Ruby193\bin;C:\Tools\NUnit\bin;C:\Tools\xUnit;C:\Tools\MSpec;C:\Tools\Coverity\bin;C:\Program Files (x86)\CMake\bin;C:\go\bin;C:\Program Files\Java\jdk1.8.0\bin;C:\Python27;C:\Program Files\nodejs;C:\Program Files (x86)\iojs;C:\Program Files\iojs;C:\Users\appveyor\AppData\Roaming\npm;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files (x86)\MSBuild\14.0\Bin;C:\Tools\NuGet;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\CommonExtensions\Microsoft\TestWindow;C:\Program Files\Microsoft DNX\Dnvm;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\130\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL Server\130\DTS\Binn\;C:\Program Files\Microsoft SQL Server\130\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files (x86)\Apache\Maven\bin;C:\Python27\Scripts;C:\Tools\NUnit3;C:\Program Files\Mercurial\;C:\Program Files\LLVM\bin;C:\Program Files\dotnet\;C:\Program Files\erl8.3\bin;C:\Tools\curl\bin;C:\Program Files\Amazon\AWSCLI\;C:\Program Files (x86)\Microsoft SQL Server\140\DTS\Binn\;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\SQLDB\DAC\140;C:\Program Files\Git\cmd;C:\Program Files\Git\usr\bin;C:\Tools\vcpkg;C:\Program Files\Microsoft Service Fabric\bin\Fabric\Fabric.Code;C:\Program Files\Microsoft SDKs\Service Fabric\Tools\ServiceFabricLocalClusterManager;C:\Program Files (x86)\Yarn\bin;C:\ProgramData\chocolatey\bin;C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\;C:\Program Files\Microsoft SQL Server\140\Tools\Binn\;C:\Program Files\Microsoft SQL Server\140\DTS\Binn\;C:\Program Files (x86)\nodejs\;C:\Users\appveyor\AppData\Local\Yarn\bin;C:\Users\appveyor\AppData\Roaming\npm;C:\Program Files\AppVeyor\BuildAgent\;..
[error] To resolve this issue you may do one of the following:
[error]  - remove or uninstall the offending library
[error]  - set the system property jna.nosys=true
[error]  - set jna.boot.library.path to include the path to the version of the 
[error]    jnidispatch library included with the JNA jar file you are using
[error] 
[error] 	at com.sun.jna.Native.<clinit>(Native.java:199)

notes

A workaround might be to forcefully set sys.props("jna.nosys") to true.