lineEnding ignored in a child project

I have a parent project and a child project. The child project builds an assembly composed of text files.

<fileSet>
<outputDirectory>bin</outputDirectory>
<directory>src/main/bin</directory>
<lineEnding>unix</lineEnding>
<includes>
<include>*.sh</include>
</includes>
</fileSet>

When I build the assembly from the child project , maven adds unix endings, but when I build it from the parent project, lineEnding is being ignored.