Why can I not satisfy "(&(osgi.extender=osgi.component)(version>=1.3.0)(!(version>=2.0.0)))"

[tom]

I'm trying to build a custom karaf distribution using the maven karaf-assembly 
packaging type.

My latest issue is that the build fails with 

missing requirement osgi.extender; 
filter:="(&(osgi.extender=osgi.component)(version>=1.3.0)(!(version>=2.0.0)))"

I interpret this as meaning the bundle uses DS and therefore I need 
apache.felix.scr.

If I don't add my bundle in, the build works, and when I start up the resulting 
karaf, feature:list shows that scr is installed and started. "bundle:headers 
mvn:org.apache.felix/org.apache.felix.scr/2.0.10" shows:

Provide-Capability =
        
osgi.extender;uses:=org.osgi.service.component;osgi.extender=osgi.component;version:Version=1.3

So I appear to have that capability don't I? 

So why does the build apparently fail in that way?

My POM has:
   <dependencies>
        <dependency>
            <groupId>org.apache.karaf.features</groupId>
            <artifactId>framework</artifactId>
            <version>${karafVersion}</version>
            <type>kar</type>
        </dependency>
        <dependency>
            <groupId>org.apache.karaf.features</groupId>
            <artifactId>standard</artifactId>
            <version>${karafVersion}</version>
            <classifier>features</classifier>
            <type>xml</type>
                        <scope>compile</scope>
        </dependency>

and then:

            <plugin>
                <groupId>org.apache.karaf.tooling</groupId>
                <artifactId>karaf-maven-plugin</artifactId>
                                 <version>4.1.1</version>
                                 <extensions>true</extensions>
                <configuration>
                    <installedFeatures>
                        <feature>wrapper</feature>
                    </installedFeatures>
                    <startupFeatures>
                        <feature>eventadmin</feature>
                    </startupFeatures>
                    <bootFeatures>
                        <feature>standard</feature>
                        <feature>webconsole</feature>
                        <feature>http-whiteboard</feature>
                        <feature>scr</feature>
                        <feature>prereqs</feature>
                    </bootFeatures>
                    <javase>1.8</javase>
                </configuration>
            </plugin>