UnrealBuildTool could not compile - Something to do with Roslyn?

Development Programming & Scripting C++
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1

I’m trying to build Unreal Engine from source, but when I do I run into this error when running the GenerateProjectFiles.bat:


C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0\bin\Microsoft.CSharp.CurrentVersion.targets(
321,5): error MSB4019: The imported project "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0
\bin\Roslyn\Microsoft.CSharp.Core.targets" was not found. Confirm that the path in the <Import> declaration is correct,
 and that the file exists on disk. [C:\UnrealEngine-release\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cspr
oj]
C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0\bin\Microsoft.CSharp.CurrentVersion.targets(
321,5): error MSB4019: The imported project "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0
\bin\Roslyn\Microsoft.CSharp.Core.targets" was not found. Confirm that the path in the <Import> declaration is correct,
 and that the file exists on disk. [C:\UnrealEngine-release\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cspr
oj]

Any idea what could be causing this? I don’t have a Roslyn folder, but I don’t know why it would be looking for that in the first place. Thanks in advance!

2

Did you install the “desktop development with .net” package for VS? Unreal build tool is written in C#, so it’s necessary to compile it.

4 Likes
3

Ah, yep. That did it! Thanks :slight_smile:

4

Did it for me too :slight_smile:

5

Same here - thanks a lot ! <3

6

fixed! thanks

7

For me, I did install “desktop development with C++” and it work. Thank for you reply, it help me to found the solution