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

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/dotnet-install.sh --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/dotnet-install.sh --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.

Reference: https://github.com/aws/aws-codebuild-docker-images/issues/497

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.