# Build target and cook variant mismatch?

**URL:** <https://forums.unrealengine.com/t/build-target-and-cook-variant-mismatch/728010>\
**Category:** Platform & Builds\
**Tags:** problems, unreal-engine, question\
**Created:** [December 14, 2022, 9:21am UTC](https://forums.unrealengine.com/t/build-target-and-cook-variant-mismatch/728010 "2022-12-14T09:21:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![QinQ](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@QinQ](https://forums.unrealengine.com/u/QinQ)\
**Post date:** [December 14, 2022, 9:21am UTC](https://forums.unrealengine.com/t/build-target-and-cook-variant-mismatch/728010/1 "2022-12-14T09:21:52Z")

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I created a fresh version of Lyra project and built unreal 5.1 from source. When I open the project launcher and try to build LyraGame windows server and by the book, it says that there is a mismatch. How can I fix this issue?

 ![Untitled](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/1/4/2143024a509782340b01bbad69f6fda4f8bdc376.jpeg)

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**Author:** ![the1928tommygun](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@the1928tommygun](https://forums.unrealengine.com/u/the1928tommygun)\
**Post date:** [September 21, 2023, 6:10pm UTC](https://forums.unrealengine.com/t/build-target-and-cook-variant-mismatch/728010/2 "2023-09-21T18:10:59Z")

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you have to select a matching “Default Build Target” from the menu at the top