# \#source-build **URL:** https://forums.unrealengine.com/tag/source-build/6352.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [UE5 source build packaging takes 2 hours vs 2 minutes (launcher) ](https://forums.unrealengine.com/t/ue5-source-build-packaging-takes-2-hours-vs-2-minutes-launcher/2719900)
**Author:** [@anchorHUN](https://forums.unrealengine.com/u/anchorHUN)\ **Replies:** 2\ **Last updated:** [July 5, 2026, 1:23pm UTC](https://forums.unrealengine.com/t/ue5-source-build-packaging-takes-2-hours-vs-2-minutes-launcher/2719900 "2026-07-05T13:23:04Z")
I’ve built UE 5.7 and 5.8 from source, and I’m seeing a huge difference in packaging times compared to the Epic launcher version. Using the launcher build, packaging the exact same project takes around 2 minutes. With … --- ## [Getting "error C4756: overflow in constant arithmetic" while building Unreal 5.4.2 from source code](https://forums.unrealengine.com/t/getting-error-c4756-overflow-in-constant-arithmetic-while-building-unreal-5-4-2-from-source-code/1897276)
**Author:** [@balikamca](https://forums.unrealengine.com/u/balikamca)\ **Replies:** 29\ **Last updated:** [July 1, 2026, 5:31am UTC](https://forums.unrealengine.com/t/getting-error-c4756-overflow-in-constant-arithmetic-while-building-unreal-5-4-2-from-source-code/1897276 "2026-07-01T05:31:16Z")
(Please also read the 2nd message, most probably it is related to installing Windows SDK) I was able to build Unreal engine from source code previously. After some time, I tried again with Unreal 5.4.2 version with VS 2… --- ## [UE5.7 source build is not incremental building? ](https://forums.unrealengine.com/t/ue5-7-source-build-is-not-incremental-building/2718147)
**Author:** [@profoundsolitude](https://forums.unrealengine.com/u/profoundsolitude)\ **Replies:** 1\ **Last updated:** [April 26, 2026, 10:44pm UTC](https://forums.unrealengine.com/t/ue5-7-source-build-is-not-incremental-building/2718147 "2026-04-26T22:44:37Z")
Specs at the bottom of the post. Transitioning to a source build of the engine has taken my 5-10 second incremental builds and turned them into 5-7 minute builds. When it’s working. The problem is, Unreal keeps trying t… --- ## ["Unable to launch ./UnrealEngine/Engine/Binaries/Linux/ShaderCompileWorker - make sure you built ShaderCompileWorker." on Ubuntu 21.04](https://forums.unrealengine.com/t/unable-to-launch-unrealengine-engine-binaries-linux-shadercompileworker-make-sure-you-built-shadercompileworker-on-ubuntu-21-04/486021)
**Author:** [@anonymous\_user\_fadfa2f5](https://forums.unrealengine.com/u/anonymous_user_fadfa2f5)\ **Replies:** 3\ **Last updated:** [April 22, 2026, 10:12am UTC](https://forums.unrealengine.com/t/unable-to-launch-unrealengine-engine-binaries-linux-shadercompileworker-make-sure-you-built-shadercompileworker-on-ubuntu-21-04/486021 "2026-04-22T10:12:33Z")
I am following the \[Linux Quick Start\]\[1\] guide on Ubuntu 21.04, completing through step 3 (compiling from source). But when I try to run step 4 cd Engine/Binaries/Linux && ./UE4Editor, I get the error from the title whe… --- ## [Mac Apple Chip External Drive Engine Source Build Tips](https://forums.unrealengine.com/t/mac-apple-chip-external-drive-engine-source-build-tips/2714895)
**Author:** [@locosoft1986](https://forums.unrealengine.com/u/locosoft1986)\ **Replies:** 0\ **Last updated:** [April 13, 2026, 2:41am UTC](https://forums.unrealengine.com/t/mac-apple-chip-external-drive-engine-source-build-tips/2714895 "2026-04-13T02:41:06Z")
TLDR: It’s better to use APFS case insensitive file system (just APFS by default) if you want to build the Mac UE from source on your external drive. If you use APFS case sensitive file system. There is a reference err… --- ## [Building Unreal Engine Editor from source fails](https://forums.unrealengine.com/t/building-unreal-engine-editor-from-source-fails/2695059)
**Author:** [@shue\_it](https://forums.unrealengine.com/u/shue_it)\ **Replies:** 1\ **Last updated:** [March 3, 2026, 3:21pm UTC](https://forums.unrealengine.com/t/building-unreal-engine-editor-from-source-fails/2695059 "2026-03-03T15:21:33Z")
Hello, I’m trying to build Unreal Engine from source (based on 5.7.1-release tag). I followed the README instructions and : executed Setup.bat script executed GenerateProjectFiles.bat script Open the project from UE5… --- ## [Engine Source Version Setup.bat(GitDependencies.exe)Failed to read '...\\Engine\\Build\\Commit.gitdeps.xml': System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize](https://forums.unrealengine.com/t/engine-source-version-setup-bat-gitdependencies-exe-failed-to-read-engine-build-commit-gitdeps-xml-system-configuration-configurationerrorsexception-configuration-system-failed-to-initialize/2619483)
**Author:** [@zyzy29221](https://forums.unrealengine.com/u/zyzy29221)\ **Replies:** 0\ **Last updated:** [July 26, 2025, 9:35pm UTC](https://forums.unrealengine.com/t/engine-source-version-setup-bat-gitdependencies-exe-failed-to-read-engine-build-commit-gitdeps-xml-system-configuration-configurationerrorsexception-configuration-system-failed-to-initialize/2619483 "2025-07-26T21:35:20Z")
I used to be able to download the engine source file normally through Setup.bat and finally compile it in VS, but later I uninstalled VS2019 (only VS2022 remained) and modified some NET framework,then I can no longer suc… --- ## [Source Build engine code debugging but skip engine code compile check?](https://forums.unrealengine.com/t/source-build-engine-code-debugging-but-skip-engine-code-compile-check/2231770)
**Author:** [@KethersHao](https://forums.unrealengine.com/u/KethersHao)\ **Replies:** 0\ **Last updated:** [December 19, 2024, 9:42am UTC](https://forums.unrealengine.com/t/source-build-engine-code-debugging-but-skip-engine-code-compile-check/2231770 "2024-12-19T09:42:13Z")
Hey guys, I’m using both binary build downloaded from Epic Games Launcher and source build from github. As it’s known to all that for C++ programmer using unreal engine, if you want to debug game code to track those tri… --- ## [Metahuman plugin for source build](https://forums.unrealengine.com/t/metahuman-plugin-for-source-build/689576)
**Author:** [@kiranmaya](https://forums.unrealengine.com/u/kiranmaya)\ **Replies:** 7\ **Last updated:** [November 19, 2024, 2:54pm UTC](https://forums.unrealengine.com/t/metahuman-plugin-for-source-build/689576 "2024-11-19T14:54:29Z")
Hi, How To install the metahuman plugin to the unreal engine source build? epic launcher says no unreal engine exists to add/Install, for my knowledge,I found that there is no way to add source build engines to the e… --- ## [How to add marketplace plugin to your source build engine editor](https://forums.unrealengine.com/t/how-to-add-marketplace-plugin-to-your-source-build-engine-editor/1890649)
**Author:** [@iPoNet](https://forums.unrealengine.com/u/iPoNet)\ **Replies:** 0\ **Last updated:** [June 5, 2024, 10:51am UTC](https://forums.unrealengine.com/t/how-to-add-marketplace-plugin-to-your-source-build-engine-editor/1890649 "2024-06-05T10:51:07Z")
Assuming you have your UE source build compiled Download the plugin from github source for instance im using VaREST plugin you can download from zip or releases find your UE installation folder Engine\\Plugins\\Marketpl… --- ## [Building UE5 from source takes 12h. How can I fix this?](https://forums.unrealengine.com/t/building-ue5-from-source-takes-12h-how-can-i-fix-this/511182)
**Author:** [@Vinstand](https://forums.unrealengine.com/u/Vinstand)\ **Replies:** 7\ **Last updated:** [January 31, 2024, 4:34pm UTC](https://forums.unrealengine.com/t/building-ue5-from-source-takes-12h-how-can-i-fix-this/511182 "2024-01-31T16:34:19Z")
Hi, I wanted to test out UE5 so I cloned the 5.0 branch from GitHub, then clicked on the Setup.bat, then GenerateProjectFiles.bat and then opened the UE5.sln in VS 2022. There I selected Development Editor and Win64. In … --- ## [Why do all editor windows and pop-ups have this diagnostic stuff blocking important parts of the screen??](https://forums.unrealengine.com/t/why-do-all-editor-windows-and-pop-ups-have-this-diagnostic-stuff-blocking-important-parts-of-the-screen/1364702)
**Author:** [@heyx3](https://forums.unrealengine.com/u/heyx3)\ **Replies:** 3\ **Last updated:** [November 5, 2023, 5:57pm UTC](https://forums.unrealengine.com/t/why-do-all-editor-windows-and-pop-ups-have-this-diagnostic-stuff-blocking-important-parts-of-the-screen/1364702 "2023-11-05T17:57:18Z")
Image attached. This is a source build of 5.3, with no modifications except the addition of Rider’s unreal plugin. --- ## [Marketplace plugins skipped during packaging project in source built engine.](https://forums.unrealengine.com/t/marketplace-plugins-skipped-during-packaging-project-in-source-built-engine/476907)
**Author:** [@mad\_methods](https://forums.unrealengine.com/u/mad_methods)\ **Replies:** 6\ **Last updated:** [November 3, 2023, 2:30am UTC](https://forums.unrealengine.com/t/marketplace-plugins-skipped-during-packaging-project-in-source-built-engine/476907 "2023-11-03T02:30:29Z")
I have marketplace plugins working in editor, but when I package my project it “skips” the marketplace plugins and errors out complaining that the plugin isn’t there (obviously because it was skipped). What I have done: … --- ## [Errors Building UE5.2 and 5.2 Preview-1](https://forums.unrealengine.com/t/errors-building-ue5-2-and-5-2-preview-1/775605)
**Author:** [@Gabriel\_Paiva\_H](https://forums.unrealengine.com/u/Gabriel_Paiva_H)\ **Replies:** 9\ **Last updated:** [August 2, 2023, 9:34pm UTC](https://forums.unrealengine.com/t/errors-building-ue5-2-and-5-2-preview-1/775605 "2023-08-02T21:34:05Z")
Hello, am getting two FAILS at building the source for 5.2. Mainly Unsync and UE5ProgramRules. Unsync.vcxproj Fails like this: Build started... 16\>Building Unsync... 6\>Using Visual Studio 2022 14.34.31942 toolchain (… --- ## [Is there any quick way of switching solution config from Development Editor to DebugGame Editor?](https://forums.unrealengine.com/t/is-there-any-quick-way-of-switching-solution-config-from-development-editor-to-debuggame-editor/796327)
**Author:** [@S\_Q\_R](https://forums.unrealengine.com/u/S_Q_R)\ **Replies:** 0\ **Last updated:** [March 22, 2023, 9:54am UTC](https://forums.unrealengine.com/t/is-there-any-quick-way-of-switching-solution-config-from-development-editor-to-debuggame-editor/796327 "2023-03-22T09:54:02Z")
So I’m working on 4.27 source version of the engine. I need to switch solution config from time to time to debug the code. When I was working on binary version of the engine from marketplace that switch was relatively qu… --- ## [Swarm Lighting Build Fails in Source Build. "Failed to cache the required dependancy" HELP!](https://forums.unrealengine.com/t/swarm-lighting-build-fails-in-source-build-failed-to-cache-the-required-dependancy-help/793310)
**Author:** [@Kinglumps](https://forums.unrealengine.com/u/Kinglumps)\ **Replies:** 0\ **Last updated:** [March 17, 2023, 11:53pm UTC](https://forums.unrealengine.com/t/swarm-lighting-build-fails-in-source-build-failed-to-cache-the-required-dependancy-help/793310 "2023-03-17T23:53:33Z")
I’ve been trying to build lighting in a source build of UE 5.1 but I keep getting “Lighting Build Failed” after starting the Swarm Connection. I’ve rebuilt UnrealLightmass and followed all the solutions listed at the bot… --- ## [SimpleUGC Mods giving error saying it found the .uplugin file in two locations](https://forums.unrealengine.com/t/simpleugc-mods-giving-error-saying-it-found-the-uplugin-file-in-two-locations/742890)
**Author:** [@Dualunitfold1](https://forums.unrealengine.com/u/Dualunitfold1)\ **Replies:** 0\ **Last updated:** [January 5, 2023, 3:19pm UTC](https://forums.unrealengine.com/t/simpleugc-mods-giving-error-saying-it-found-the-uplugin-file-in-two-locations/742890 "2023-01-05T15:19:35Z")
Hi, I’m using a source build of UE-4.27.2, and trying to add mods to my project using the SimpleUGC plugin. I have tried both with the UGCExample project and with my own project, and in both instances, when running Gene… --- ## [Verify integrity of engine files on source version?](https://forums.unrealengine.com/t/verify-integrity-of-engine-files-on-source-version/728263)
**Author:** [@S\_Q\_R](https://forums.unrealengine.com/u/S_Q_R)\ **Replies:** 0\ **Last updated:** [December 14, 2022, 4:16pm UTC](https://forums.unrealengine.com/t/verify-integrity-of-engine-files-on-source-version/728263 "2022-12-14T16:16:50Z")
Hi. I’m on 4.27 source version of the engine. Recently lots of materials lost their parent references and stuff just does not render correctly. Is there any option to verify integrity of the engine files simmilar to th… --- ## [Intermediate Floder size](https://forums.unrealengine.com/t/intermediate-floder-size/689579)
**Author:** [@kiranmaya](https://forums.unrealengine.com/u/kiranmaya)\ **Replies:** 2\ **Last updated:** [December 9, 2022, 6:36am UTC](https://forums.unrealengine.com/t/intermediate-floder-size/689579 "2022-12-09T06:36:02Z")
hi, when I build a project with source build, the Intermediate folder gets larger about 54 gigs for 3 platforms. and it doesn’t generate that much when I used to build to epic launcher build. any other way to achieve th… --- ## [Non-intuitive and conflicting names in GAS Ability Tasks](https://forums.unrealengine.com/t/non-intuitive-and-conflicting-names-in-gas-ability-tasks/602789)
**Author:** [@lucoiso](https://forums.unrealengine.com/u/lucoiso)\ **Replies:** 0\ **Last updated:** [July 12, 2022, 2:45am UTC](https://forums.unrealengine.com/t/non-intuitive-and-conflicting-names-in-gas-ability-tasks/602789 "2022-07-12T02:45:31Z")
Pull Request: #9381 There’s 3 Ability Tasks: AbilityTask\_WaitConfirm: This task will wait for the ability to be confirmed by the server. AbilityTask\_WaitCancel: This task waits for the Cancel Input. AbilityTask\_WaitCon… --- ## [Comprehensive Unreal Engine Source Build User Guide - Where is it?](https://forums.unrealengine.com/t/comprehensive-unreal-engine-source-build-user-guide-where-is-it/596278)
**Author:** [@Calrizien](https://forums.unrealengine.com/u/Calrizien)\ **Replies:** 0\ **Last updated:** [July 3, 2022, 7:36pm UTC](https://forums.unrealengine.com/t/comprehensive-unreal-engine-source-build-user-guide-where-is-it/596278 "2022-07-03T19:36:44Z")
Many of us, myself included, want to build and package games while being unfamiliar with the intricacies of IDEs. I have read all the documentation Epic provides for working with a source-built Engine version. Yet I find… --- ## [UE5 Source Build - Mass Entity plugin compiler errors?](https://forums.unrealengine.com/t/ue5-source-build-mass-entity-plugin-compiler-errors/494525)
**Author:** [@Majkl](https://forums.unrealengine.com/u/Majkl)\ **Replies:** 1\ **Last updated:** [June 15, 2022, 6:59pm UTC](https://forums.unrealengine.com/t/ue5-source-build-mass-entity-plugin-compiler-errors/494525 "2022-06-15T18:59:28Z")
I am using VS 2022, and installed all recommended prerequisites/tools to try to build UE5 from source. During compilation I keep getting errors coming from the Engine/Plugins/MassEntity/ module, and any files that refere… --- ## [UESource project and team work](https://forums.unrealengine.com/t/uesource-project-and-team-work/546671)
**Author:** [@LuisZ](https://forums.unrealengine.com/u/LuisZ)\ **Replies:** 0\ **Last updated:** [May 2, 2022, 2:11pm UTC](https://forums.unrealengine.com/t/uesource-project-and-team-work/546671 "2022-05-02T14:11:35Z")
Hello everyone! I have a question, I hope you can help me. If I’m working with an unreal project created with the source version of the engine, must all my work team necessarily have that version if they want to make ch… --- ## [Safe to uninstall after building engine from source?](https://forums.unrealengine.com/t/safe-to-uninstall-after-building-engine-from-source/514283)
**Author:** [@Xyoron](https://forums.unrealengine.com/u/Xyoron)\ **Replies:** 0\ **Last updated:** [April 5, 2022, 10:29pm UTC](https://forums.unrealengine.com/t/safe-to-uninstall-after-building-engine-from-source/514283 "2022-04-05T22:29:11Z")
Hi! Since I need more space is it safe to uninstall the standard build installed from the Epic launcher if I’ve built the engine from source using visual studio? Thanks! --- ## [99% Memory usage + extreme lag when building UE4 from source](https://forums.unrealengine.com/t/99-memory-usage-extreme-lag-when-building-ue4-from-source/509308)
**Author:** [@cugs](https://forums.unrealengine.com/u/cugs)\ **Replies:** 0\ **Last updated:** [March 23, 2022, 11:44pm UTC](https://forums.unrealengine.com/t/99-memory-usage-extreme-lag-when-building-ue4-from-source/509308 "2022-03-23T23:44:49Z")
As the title suggests, I’m trying to build UE4 4.26 from source, following these steps: Building Unreal Engine from Source | Unreal Engine Documentation Pretty soon after pressing ‘build’, my PC’s RAM usage shoots up to… --- ## [Can't start C++ projects when UE is compiled from source](https://forums.unrealengine.com/t/cant-start-c-projects-when-ue-is-compiled-from-source/488899)
**Author:** [@extaticdragon\_1](https://forums.unrealengine.com/u/extaticdragon_1)\ **Replies:** 1\ **Last updated:** [September 22, 2021, 3:25pm UTC](https://forums.unrealengine.com/t/cant-start-c-projects-when-ue-is-compiled-from-source/488899 "2021-09-22T15:25:03Z")
Hello! I’ve grabbed the UE4 source code from the release branch on github, ran Setup.bat then GenerateProjectFiles.bat then compiled using the latest version of Visual Studio 2019. Everything was running perfectly smooth… --- ## [Package project cook failed how do i fix](https://forums.unrealengine.com/t/package-project-cook-failed-how-do-i-fix/465461)
**Author:** [@TuxTheAstronaut](https://forums.unrealengine.com/u/TuxTheAstronaut)\ **Replies:** 6\ **Last updated:** [August 2, 2021, 9:28am UTC](https://forums.unrealengine.com/t/package-project-cook-failed-how-do-i-fix/465461 "2021-08-02T09:28:02Z")
I’m trying to package a project for windows on Ue4 4.25 source build and when it dose thee cook command i get this error this even happens when i moved my content over to a new project UATHelper: Packaging (Windows (64… --- ## [Android/IOS rendering preview doesn't work on UE4 source.](https://forums.unrealengine.com/t/android-ios-rendering-preview-doesnt-work-on-ue4-source/483903)
**Author:** [@Muhaimin\_Todak](https://forums.unrealengine.com/u/Muhaimin_Todak)\ **Replies:** 0\ **Last updated:** [May 26, 2021, 4:12am UTC](https://forums.unrealengine.com/t/android-ios-rendering-preview-doesnt-work-on-ue4-source/483903 "2021-05-26T04:12:35Z")
Hey there guys, I’m using gitHub UE4 source 4.24.3, and this is what I got! Mobile Rendering Preview not working! - YouTube I need to see android rendering in editor and create the game as as android! But apparently I ca… --- ## [How to start UE4 instance when building from source after I've closed the Visual Studio project without having to build it from scratch every time?](https://forums.unrealengine.com/t/how-to-start-ue4-instance-when-building-from-source-after-ive-closed-the-visual-studio-project-without-having-to-build-it-from-scratch-every-time/483219)
**Author:** [@komputer](https://forums.unrealengine.com/u/komputer)\ **Replies:** 10\ **Last updated:** [May 12, 2021, 7:23pm UTC](https://forums.unrealengine.com/t/how-to-start-ue4-instance-when-building-from-source-after-ive-closed-the-visual-studio-project-without-having-to-build-it-from-scratch-every-time/483219 "2021-05-12T19:23:37Z")
Hello, my first question here, so I hope I file it correctly. In order to use ARCore I’m required to build UE4 from source. This took a really long time but I finally managed to do run it. It was working fine when I star… --- ## [Datasmith plugins with EmbedSrcSrvInfo=true causing creation of installed builds to fail](https://forums.unrealengine.com/t/datasmith-plugins-with-embedsrcsrvinfo-true-causing-creation-of-installed-builds-to-fail/466035)
**Author:** [@KamikazeXeX](https://forums.unrealengine.com/u/KamikazeXeX)\ **Replies:** 4\ **Last updated:** [April 14, 2021, 4:00pm UTC](https://forums.unrealengine.com/t/datasmith-plugins-with-embedsrcsrvinfo-true-causing-creation-of-installed-builds-to-fail/466035 "2021-04-14T16:00:43Z")
Hey everyone. Over the last week or two I’ve been periodically trying to create an installed build from the “4.25” branch from github (I have also tested the release branch, the same error occurs) I am packaging with f… [Next page](https://forums.unrealengine.com/tag/source-build/6352.md?match_all_tags=true&page=1&tags%5B%5D=source-build)