installing node and npm execution does not respect .npmrc registry setting

I have tried using .npmrc to set the npm registry, but is ignored by the install node and npm execution. However, If I change the nodeVersion and npmVersion in that step to to provided (to prevent the attempted npm/node downloads), the setting in .npmrc is respected by the subsequent npm install execution. I have seen this same behavior now in completely different projects.

I have tried placing .npmrc is in the parent directory of the pom.xml and also in the same directory as the pom.xml

Configuration is like this:

<plugin>
    <groupId>com.github.eirslett</groupId>
    <artifactId>frontend-maven-plugin</artifactId>
    <version>1.7.6</version>
    <configuration>
        <nodeVersion>v10.13.0</nodeVersion>
        <npmVersion>6.9.0</npmVersion>
    </configuration>
    <executions>
        <execution>
            <id>install node and npm</id>
            <goals>
                <goal>install-node-and-npm</goal>
            </goals>
        </execution>
        <execution>
            <id>npm install</id>
            <goals>
                <goal>npm</goal>
            </goals>
        </execution>
    </executions>
</plugin>

Watching the build, I can see it attempting to download (for example) npm from:

https://registry.npmjs.org/npm/-/npm-6.9.0.tgz

Instead of our internal mirror as defined in .npmrc.

Any suggestions?

[ajkimoto]

I am embarrassed. It turns out that I needed to add the correct value in the <npmDownloadRoot> tag. All is well now.

[eirslett]

Why do you have <configuration> inside <configuration>?