Dependencies crash with NullPointerException on system dependencies

In my pom I have the following dependency:

<dependency>
<groupId>jre</groupId>
<artifactId>javaws</artifactId>
<version>1.5.0</version>
<type>jar</type>
<scope>system</scope>
<systemPath>$

/lib/javaws.jar</systemPath>
</dependency>

This dependency is correctly resolved and found but when I run "site-deploy" the "dependencies" report crashes as shown below:

[INFO] Generate "Dependencies" report.
[INFO] -------------------------------------------------------------------------
—
[ERROR] FATAL ERROR
[INFO] -------------------------------------------------------------------------
—
[INFO] null
[INFO] -------------------------------------------------------------------------
—
[INFO] Trace
java.lang.NullPointerException
at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(De
faultArtifactResolver.java:82)
at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(De
faultArtifactResolver.java:63)
at org.apache.maven.project.DefaultMavenProjectBuilder.findModelFromRepo
sitory(DefaultMavenProjectBuilder.java:386)
at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromReposito
ry(DefaultMavenProjectBuilder.java:351)
at org.apache.maven.report.projectinfo.DependenciesReport$DependenciesRe
nderer.getMavenProjectFromRepository(DependenciesReport.java:362)
at org.apache.maven.report.projectinfo.DependenciesReport$DependenciesRe
nderer.renderBody(DependenciesReport.java:242)
at org.apache.maven.reporting.AbstractMavenReportRenderer.render(Abstrac
tMavenReportRenderer.java:65)
at org.apache.maven.report.projectinfo.DependenciesReport.executeReport(
DependenciesReport.java:157)
at org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMaven
Report.java:98)