ERROR: Couldn't find target rules file for target 'UE4Editor' in rules assembly 'UE5Rules, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.

[ue4-docker build] Error: failed to build image “adamrehn/ue4-engine:5.0.0-ltsc2019-vs2019”.

Step 1/8 : ARG NAMESPACE
Step 2/8 : ARG TAG
Step 3/8 : ARG PREREQS_TAG
Step 4/8 : FROM ${NAMESPACE}/ue4-source:${TAG}-${PREREQS_TAG}
 ---> fe420154cb8b
Step 5/8 : RUN GenerateProjectFiles.bat && echo. && echo.RUN directive complete. Docker will now commit the filesystem layer to disk. && echo.Note that for large filesystem layers this can take quite some time. && echo.Performing filesystem layer commit... && echo.
 ---> Using cache
 ---> efa6bdfc160a
Step 6/8 : RUN .\Engine\Build\BatchFiles\Build.bat UE4Editor Win64 Development -WaitMutex && echo. && echo.RUN directive complete. Docker will now commit the filesystem layer to disk. && echo.Note that for large filesystem layers this can take quite some time. && echo.Performing filesystem layer commit... && echo.
 ---> Running in 4ec92b61447e
Using bundled DotNet SDK
Log file: C:\UnrealEngine\Engine\Programs\UnrealBuildTool\Log.txt
Using 'git status' to determine working set for adaptive non-unity build (C:\UnrealEngine).
Creating makefile for UE4Editor (no existing makefile)
ERROR: Couldn't find target rules file for target 'UE4Editor' in rules assembly 'UE5Rules, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.
       Location: C:\UnrealEngine\Engine\Intermediate\Build\BuildRules\UE5Rules.dll
       Target rules found:
The command 'cmd /S /C .\Engine\Build\BatchFiles\Build.bat UE4Editor Win64 Development -WaitMutex && echo. && echo.RUN directive complete. Docker will now commit the filesystem layer to disk. && echo.Note that for large filesystem layers this can take quite some time. && echo.Performing filesystem layer commit... && echo.' returned a non-zero code: 6
[ue4-docker build] Error: failed to build image "adamrehn/ue4-engine:5.0.0-ltsc2019-vs2019".

command : ue4-docker build --ue-version 5.0.0 --visual-studio 2019 using virtual machine windows server 2019

[jonpas]

I really, really wonder if anyone needs ue4-engine image at all…

Even if someone does, most documented use-cases don’t have a use for it. I think it should be disabled by default.

--target=full should be the default. I think it’s better than just --target=minimal because it’s a very quick to build on top of full and quite useful.

[slonopotamus]

Please, use --no-engine, or, better --target=full/--target=minimal. ue4-engine image is currently broken for UE5.