Running .Net Core 6 on CodeBuild throws SDK not supported error


I'm trying to build an infrastructure using CodePipeline and CodeBuild. I've a .NET project with targetFramework set as .Net Core 6. When the CodeBuild process triggers the build, it throws an error

/root/.dotnet/sdk/5.0.202/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(141,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 6.0. Either target .NET 5.0 or lower, or use a version of the .NET SDK that supports .NET 6.0.

If I switch the targetFramework to .Net Core 3.1 or 5, it works fine. Has anyone faced this issue before? If yes, how did they overcome it?

1 Answer

After doing some digging and talking to couple of folks, I realized that CodeBuild doesn't support .Net Core 6 yet. But there is a work around by explicitly installing the latest SDKs on the container as part of your infrastructure setup.

I added the following command to my synth workflow which installed the latest SDKs on the docker.

"/usr/local/bin/ --channel LTS"

There are different ways to use it depending on your use case. I've added in my C# code as a Install Command when building the pipeline

        private static readonly string[] InstallCommands =
            "/usr/local/bin/ --channel LTS" 

 var synth = new ShellStep("Synth",
                new ShellStepProps
                    InstallCommands = InstallCommands,

            var pipeline = new CodePipeline(this, "Pipeline", new CodePipelineProps { Synth = synth });

I believe it can also be added to buildspec.yml file. There's an example in following link.


When to expect official .Net Core 6 support on Code Build

I believe the support for .Net Core 6 with CodeBuild will be available in the near future. Found some additional resource for Core 6 support on different AWS Services.

answered 2 years ago

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