Siafu is a context simulator
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] MavenParent ........................................ SUCCESS [ 0.004 s]
[INFO] Siafu Simulator .................................... FAILURE [01:27 min]
[INFO] Siafu datatypes library ............................ SKIPPED
[INFO] Simulation-Glasgow ................................. SKIPPED
[INFO] Simulation-Leimen .................................. SKIPPED
[INFO] Simulation-Office .................................. SKIPPED
[INFO] Simulation-Testland ................................ SKIPPED
[INFO] Simulation-Valencia ................................ SKIPPED
[INFO] Simulations ........................................ SKIPPED
[INFO] SiafuAggregator .................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:27 min
[INFO] Finished at: 2017-04-24T15:45:12+08:00
[INFO] Final Memory: 10M/91M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project Siafu: Could not resolve dependencies for project Siafu:Siafu:jar:1.0.6-SNAPSHOT:
Failed to collect dependencies at org.eclipse.swt:org.eclipse.swt.gtk.linux.x86:jar:3.8:
Failed to read artifact descriptor for org.eclipse.swt:org.eclipse.swt.gtk.linux.x86:jar:3.8:
Could not transfer artifact org.eclipse.swt:org.eclipse.swt.gtk.linux.x86:pom:3.8 from/to swt-repo (https://swt-repo.googlecode.com/svn/repo/): Network is unreachable (connect failed) -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf
请帮我解决一下这个问题，谢谢！