Unresolveable build extension error when using the command "mvn clean install"

[berkturk95]

Hello, I cloned javacpp and javacpp-presets successfully but when I try to do the command mvn clean install, it gives this error and I can't process any further:

Downloading: https://repo.maven.apache.org/maven2/org/sonatype/plugins/nexus-staging-maven-plugin/1.6.8/nexus-staging-maven-plugin-1.6.8.pom [ERROR] [ERROR] Some problems were encountered while processing the POMs: [ERROR] Unresolveable build extension: Plugin org.sonatype.plugins:nexus-staging-maven-plugin:1.6.8 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.sonatype.plugins:nexus-staging-maven-plugin:jar:1.6.8 @

[saudet]

That's just a network failure. Try again until it downloads successfully.

[berkturk95]

I tried several times but it still gave this error. Is there any other solution that I can use?

[junlarsen]

Your network may be blocking it, ie a firewall. Try using a proxy

[saudet]

Make sure you're retrying with mvn -U ...

[berkturk95]

This does not work either.

[saudet]

BTW, there is no need to build anything by yourself. Everything is all available as snapshots: http://bytedeco.org/builds/