Unable to build target in updatesite using `mvn install`

[PuneetPatwari]

I am trying to create the update site as instructed in Readme file. However, on my Mac OSX, I get an error at the end and the target is not build.

[DEBUG] No solution found because the problem is unsatisfiable.: [Unable to satisfy dependency from org.eclipse.e4.rcp.feature.group 1.6.1.v20170928-1359 to org.eclipse.equinox.p2.iu; org.eclipse.equinox.launcher.gtk.linux.x86 [1.1.550.v20170928-1359,1.1.550.v20170928-1359].; Unable to satisfy dependency from org.eclipse.e4.rcp.feature.group 1.6.1.v20170928-1359 to org.eclipse.equinox.p2.iu; org.eclipse.swt.gtk.linux.x86 [3.106.1.v20170926-0519,3.106.1.v20170926-0519].; Unable to satisfy dependency from org.eclipse.e4.rcp.source.feature.group 1.6.1.v20170928-1359 to org.eclipse.equinox.p2.iu; org.eclipse.swt.gtk.linux.x86.source [3.106.1.v20170926-0519,3.106.1.v20170926-0519].; Unable to satisfy dependency from org.eclipse.jdt.core 3.13.100.v_OTDT_r261_201712031505 to org.eclipse.equinox.p2.iu; org.eclipse.objectteams.otdt.core.patch.feature.group [2.0.0,3.0.0).; Unable to satisfy dependency from org.eclipse.jdt.core 3.13.101.v_OTDT_r262_201803031341 to org.eclipse.equinox.p2.iu; org.eclipse.objectteams.otdt.core.patch.feature.group [2.0.0,3.0.0).; Unable to satisfy dependency from org.eclipse.jdt.core 3.13.102.v_OTDT_r262_201804012017 to org.eclipse.equinox.p2.iu; org.eclipse.objectteams.otdt.core.patch.feature.group [2.0.0,3.0.0).; Unable to satisfy dependency from org.eclipse.swt 3.106.1.v20170926-0519 to org.eclipse.equinox.p2.iu; org.eclipse.swt.gtk.linux.x86 [3.106.1.v20170926-0519,3.106.1.v20170926-0519].; No solution found because the problem is unsatisfiable.]
[ERROR] Cannot resolve target definition:
[ERROR]   Software being installed: org.eclipse.sdk.feature.group 4.7.1.v20171009-0537
[ERROR]   Missing requirement for filter properties ~= $0: org.eclipse.e4.rcp.feature.group 1.6.1.v20170928-1359 requires 'org.eclipse.equinox.p2.iu; org.eclipse.equinox.launcher.gtk.linux.x86 [1.1.550.v20170928-1359,1.1.550.v20170928-1359]' but it could not be found
[ERROR]   Cannot satisfy dependency: org.eclipse.platform.feature.group 4.7.1.v20171009-0410 depends on: org.eclipse.equinox.p2.iu; org.eclipse.rcp.feature.group [4.7.1.v20171009-0410,4.7.1.v20171009-0410]
[ERROR]   Cannot satisfy dependency: org.eclipse.rcp.feature.group 4.7.1.v20171009-0410 depends on: org.eclipse.equinox.p2.iu; org.eclipse.e4.rcp.feature.group [1.6.1.v20170928-1359,1.6.1.v20170928-1359]
[ERROR]   Cannot satisfy dependency: org.eclipse.sdk.feature.group 4.7.1.v20171009-0537 depends on: org.eclipse.equinox.p2.iu; org.eclipse.platform.feature.group [4.7.1.v20171009-0410,4.7.1.v20171009-0410]
[ERROR]
[ERROR] Failed to resolve target definition /Users/in-puneet.patwari/Documents/Workspace/TMT/etos/releng/fr.kazejiyu.etos.pim.ecore.gen.scala.target/fr.kazejiyu.etos.pim.ecore.gen.scala.target.target: See log for details -> [Help 1]
org.apache.maven.MavenExecutionException: Failed to resolve target definition /Users/in-puneet.patwari/Documents/Workspace/TMT/etos/releng/fr.kazejiyu.etos.pim.ecore.gen.scala.target/fr.kazejiyu.etos.pim.ecore.gen.scala.target.target
    at org.eclipse.tycho.core.maven.TychoMavenLifecycleParticipant.afterProjectsRead (TychoMavenLifecycleParticipant.java:100)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:264)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: org.eclipse.tycho.core.shared.BuildFailureException: Failed to resolve target definition /Users/in-puneet.patwari/Documents/Workspace/TMT/etos/releng/fr.kazejiyu.etos.pim.ecore.gen.scala.target/fr.kazejiyu.etos.pim.ecore.gen.scala.target.target
    at org.eclipse.tycho.p2.target.TargetDefinitionResolver.resolveContent (TargetDefinitionResolver.java:103)
    at org.eclipse.tycho.p2.target.TargetDefinitionResolverService.resolveFromArguments (TargetDefinitionResolverService.java:70)

Please let me know if I am doing any mistake.