# Clarification on s3 maven bucket

**URL:** <https://forum.datomic.com/t/clarification-on-s3-maven-bucket/1091>\
**Category:** Datomic Cloud\
**Created:** [July 25, 2019, 9:09am UTC](https://forum.datomic.com/t/clarification-on-s3-maven-bucket/1091 "2019-07-25T09:09:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![timeyyy](https://avatars.discourse-cdn.com/v4/letter/t/ecb155/32.png) [@timeyyy](https://forum.datomic.com/u/timeyyy)\
**Post date:** [July 25, 2019, 9:09am UTC](https://forum.datomic.com/t/clarification-on-s3-maven-bucket/1091/1 "2019-07-25T09:09:02Z")

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Hi

I just wanted to know why is datomic downloading deps from s3 instead of a maven repo. Also why do we need aws credentials to download datomic dependencies?

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**Author:** ![jaret](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/jaret/32/45_2.png) [@jaret](https://forum.datomic.com/u/jaret)\
**Post date:** [July 26, 2019, 6:03pm UTC](https://forum.datomic.com/t/clarification-on-s3-maven-bucket/1091/2 "2019-07-26T18:03:35Z")

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Datomic client is open source and is on maven central. What dependencies are you referring to?

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**Author:** ![timeyyy](https://avatars.discourse-cdn.com/v4/letter/t/ecb155/32.png) [@timeyyy](https://forum.datomic.com/u/timeyyy)\
**Post date:** [July 28, 2019, 7:26am UTC](https://forum.datomic.com/t/clarification-on-s3-maven-bucket/1091/3 "2019-07-28T07:26:00Z")

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The ion-dev dependency. As shown in the ion tutorial.

:mvn/repos {“datomic-cloud” {:url “s3://datomic-releases-1fc2183a/maven/releases”}}

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**Author:** ![marshall](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/marshall/32/48_2.png) [@marshall](https://forum.datomic.com/u/marshall)\
**Post date:** [July 30, 2019, 3:50pm UTC](https://forum.datomic.com/t/clarification-on-s3-maven-bucket/1091/4 "2019-07-30T15:50:09Z")

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Several Datomic support libraries are hosted in a private maven repo that Cognitect maintains. The `ion-dev` dependency is one of these.