solr not writing logs when it runs not from its main folder

[Mysurf Mail]

When I run solr using

java -jar "C:\solr\example\start.jar"

It writes logs to C:\solr\example\logs.

When I run it using

java -Dsolr.solr.home="C:\solr\example\solr"
     -Djetty.home="C:\solr\example"
     -Djetty.logs="C:\solr\example\logs"
     -jar "C:\solr\example\

start.jar"

it writes logs only if I run it from

C:\solr\example>

any other folder - logs are not written.
This is important as I need to run it as a service later (using nssm) What
should I change?