我正在尝试制作大象鸟猪，并且出现以下问题：
[INFO] Building Elephant Bird Pig 4.13-SNAPSHOT
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[INFO] Reactor Summary:
[INFO]
[INFO] Elephant Bird ...................................... SUCCESS [ 0.403 s]
[INFO] Elephant Bird Hadoop Compatibility ................. SUCCESS [ 0.758 s]
[INFO] Elephant Bird Core ................................. SUCCESS [ 2.457 s]
[INFO] Elephant Bird Cascading2 ........................... SUCCESS [ 0.040 s]
[INFO] Elephant Bird Crunch ............................... SUCCESS [ 0.100 s]
[INFO] Elephant Bird Hive ................................. SUCCESS [ 0.175 s]
[INFO] Elephant Bird Pig .................................. FAILURE [ 0.061 s]
[INFO] Elephant Bird Mahout ............................... SKIPPED
[INFO] Elephant Bird RCFile ............................... SKIPPED
[INFO] Elephant Bird Lucene ............................... SKIPPED
[INFO] Elephant Bird Pig Lucene ........................... SKIPPED
[INFO] Elephant Bird Examples ............................. SKIPPED
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[INFO] BUILD FAILURE
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[INFO] Total time: 4.452 s
[INFO] Finished at: 2016-01-25T21:10:37+00:00
[INFO] Final Memory: 23M/437M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project elephant-bird-pig: Could not resolve dependencies for project com.twitter.elephantbird:elephant-bird-pig:jar:4.13-SNAPSHOT: Failure to find com.twitter.elephantbird:elephant-bird-core:jar:tests:4.13-SNAPSHOT http://maven.twttr.com
知道如何克服这个问题吗？