ERROR OS=Windows and the assembly descriptor contains a *nix-specific root-relative-reference (starting with slash) / [duplicate]

Question

simplest solution to prevent that warning is:

<fileSets>
  <fileSet>
    <directory>src/main/resources</directory>
    <outputDirectory/>
  </fileSet>
</fileSets>

or an other solution is:

<fileSets>
  <fileSet>
    <directory>src/main/resources</directory>
    <outputDirectory>./</outputDirectory>
  </fileSet>
</fileSets>

and it shows that something should be fixed.