{
  fetchFromGitHub,
  lib,
  postgresql,
  postgresqlBuildExtension,
}:

let
  sources = {
    "13" = {
      version = "1.4";
      hash = "sha256-1cyvVEC9MQGMr7Tg6EUbsVBrMc8ahdFS3+CmDkmAq4Y=";
    };
    "14" = {
      version = "1.5";
      hash = "sha256-RRSpkWLFuif+6RCncnsb1NnjKnIIRY9KgebKkjCN5cs=";
    };
    "15" = {
      version = "1.5";
      hash = "sha256-RRSpkWLFuif+6RCncnsb1NnjKnIIRY9KgebKkjCN5cs=";
    };
    "16" = {
      version = "1.5";
      hash = "sha256-RRSpkWLFuif+6RCncnsb1NnjKnIIRY9KgebKkjCN5cs=";
    };
    "17" = {
      version = "1.5";
      hash = "sha256-RRSpkWLFuif+6RCncnsb1NnjKnIIRY9KgebKkjCN5cs=";
    };
    "18" = {
      version = "1.5";
      hash = "sha256-RRSpkWLFuif+6RCncnsb1NnjKnIIRY9KgebKkjCN5cs=";
    };
  };

  source =
    sources."${lib.versions.major postgresql.version}" or {
      version = "";
      hash = throw "pg_safeupdate: version specification for pg ${postgresql.version} missing.";
    };
in

postgresqlBuildExtension {
  pname = "pg-safeupdate";
  inherit (source) version;

  src = fetchFromGitHub {
    owner = "eradman";
    repo = "pg-safeupdate";
    tag = source.version;
    inherit (source) hash;
  };

  meta = {
    broken = !builtins.elem (lib.versions.major postgresql.version) (builtins.attrNames sources);
    description = "Simple extension to PostgreSQL that requires criteria for UPDATE and DELETE";
    homepage = "https://github.com/eradman/pg-safeupdate";
    changelog = "https://github.com/eradman/pg-safeupdate/raw/${source.version}/NEWS";
    platforms = postgresql.meta.platforms;
    maintainers = with lib.maintainers; [ wolfgangwalther ];
    license = lib.licenses.postgresql;
  };
}