# CI/CD deployment issues

**URL:** <https://community.cesium.com/t/ci-cd-deployment-issues/28272>\
**Category:** Cesium for Unity\
**Created:** [November 23, 2023, 4:15am UTC](https://community.cesium.com/t/ci-cd-deployment-issues/28272 "2023-11-23T04:15:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![RanXiaoQ](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/ranxiaoq/32/20632_2.png) [@RanXiaoQ](https://community.cesium.com/u/RanXiaoQ)\
**Post date:** [November 23, 2023, 4:15am UTC](https://community.cesium.com/t/ci-cd-deployment-issues/28272/1 "2023-11-23T04:15:19Z")

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Hello!  
I am trying to deploy CI/CD on GitLab, but I am facing the following problem. Is there any method to solve this issue?  
Library/PackageCache/com.cesium.unity@1.6.1/Runtime/Cesium3DTile.cs(2,7): error CS0246: The type or namespace name ‘Reinterop’ could not be found (are you missing a using directive or an assembly reference?)

 ![1](https://global.discourse-cdn.com/cesium/original/3X/7/d/7db1bff1839e22c2852ab71141d64d49c48d73ec.png)

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<div class="post-metadata">

**Author:** ![Kevin\_Ring](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/kevin_ring/32/2003_2.png) [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)\
**Post date:** [December 1, 2023, 2:26am UTC](https://community.cesium.com/t/ci-cd-deployment-issues/28272/2 "2023-12-01T02:26:37Z")

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If you’re trying to build Cesium for Unity from source (as opposed to using the built version we provide), you need to follow the developer setup instructions:

> <https://github.com/CesiumGS/cesium-unity/blob/main/Documentation~/developer-setup.md>

You may also find it helpful to look at the steps executed by our own CI process:

> <https://github.com/CesiumGS/cesium-unity/blob/main/.github/workflows/build.yml>