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https://issues.apache.org/jira/browse/ARROW-1595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16175648#comment-16175648
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ASF GitHub Bot commented on ARROW-1595:
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Github user wesm commented on the issue:
https://github.com/apache/arrow/pull/1123
+1. thanks @jreback -- if the build failures reappear we can apply this fix
> [Python] Fix package dependency issues causing build failures
> -------------------------------------------------------------
>
> Key: ARROW-1595
> URL: https://issues.apache.org/jira/browse/ARROW-1595
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Labels: pull-request-available
> Fix For: 0.8.0
>
>
> We are installing package requirements for the Python build in two steps, and
> the second step is causing conda to downgrade NumPy, resulting in an ABI
> conflict and broken build. I'm not sure why this suddenly started happening,
> but installing the packages all at once and pinning the NumPy version should
> fix it
> https://travis-ci.org/apache/arrow/jobs/278202858#L9106
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