regular@{
  lib,
  boehmgc,
  aws-sdk-cpp,
  fetchFromGitHub,
  pkgs,
}:

{
  scopeFunction = scope: {
    boehmgc = regular.boehmgc.override { enableLargeConfig = true; };

    # old nix fails to build with newer aws-sdk-cpp and the patch doesn't apply
    aws-sdk-cpp-old =
      (regular.aws-sdk-cpp.override {
        apis = [
          "s3"
          "transfer"
        ];
        customMemoryManagement = false;
      }).overrideAttrs
        (args: rec {
          # intentionally overriding postPatch
          version = "1.9.294";

          src = fetchFromGitHub {
            owner = "aws";
            repo = "aws-sdk-cpp";
            rev = version;
            hash = "sha256-Z1eRKW+8nVD53GkNyYlZjCcT74MqFqqRMeMc33eIQ9g=";
          };
          postPatch = ''
            # Avoid blanket -Werror to evade build failures on less
            # tested compilers.
            substituteInPlace cmake/compiler_settings.cmake \
              --replace '"-Werror"' ' '

            # Missing includes for GCC11
            sed '5i#include <thread>' -i \
              aws-cpp-sdk-cloudfront-integration-tests/CloudfrontOperationTest.cpp \
              aws-cpp-sdk-cognitoidentity-integration-tests/IdentityPoolOperationTest.cpp \
              aws-cpp-sdk-dynamodb-integration-tests/TableOperationTest.cpp \
              aws-cpp-sdk-elasticfilesystem-integration-tests/ElasticFileSystemTest.cpp \
              aws-cpp-sdk-lambda-integration-tests/FunctionTest.cpp \
              aws-cpp-sdk-mediastore-data-integration-tests/MediaStoreDataTest.cpp \
              aws-cpp-sdk-queues/source/sqs/SQSQueue.cpp \
              aws-cpp-sdk-redshift-integration-tests/RedshiftClientTest.cpp \
              aws-cpp-sdk-s3-crt-integration-tests/BucketAndObjectOperationTest.cpp \
              aws-cpp-sdk-s3-integration-tests/BucketAndObjectOperationTest.cpp \
              aws-cpp-sdk-s3control-integration-tests/S3ControlTest.cpp \
              aws-cpp-sdk-sqs-integration-tests/QueueOperationTest.cpp \
              aws-cpp-sdk-transfer-tests/TransferTests.cpp
            # Flaky on Hydra
            rm aws-cpp-sdk-core-tests/aws/auth/AWSCredentialsProviderTest.cpp
            # Includes aws-c-auth private headers, so only works with submodule build
            rm aws-cpp-sdk-core-tests/aws/auth/AWSAuthSignerTest.cpp
            # TestRandomURLMultiThreaded fails
            rm aws-cpp-sdk-core-tests/http/HttpClientTest.cpp
          ''
          + lib.optionalString aws-sdk-cpp.stdenv.hostPlatform.isi686 ''
            # EPSILON is exceeded
            rm aws-cpp-sdk-core-tests/aws/client/AdaptiveRetryStrategyTest.cpp
          '';

          patches = (args.patches or [ ]) ++ [ ./patches/aws-sdk-cpp-TransferManager-ContentEncoding.patch ];

          # only a stripped down version is build which takes a lot less resources to build
          requiredSystemFeatures = [ ];
        });

    aws-sdk-cpp =
      (regular.aws-sdk-cpp.override {
        apis = [
          "identity-management"
          "s3"
          "transfer"
        ];
        customMemoryManagement = false;
      }).overrideAttrs
        {
          # only a stripped down version is build which takes a lot less resources to build
          requiredSystemFeatures = [ ];
        };
  };
}