nimPackages.db_connector: package broken out of standard library

pkgs/development/nim-packages/db_connector/default.nix

···
+{ lib, buildNimPackage, fetchFromGitHub }:
+
+buildNimPackage (final: prev: {
+  pname = "db_connector";
+  version = "unstable-2023-02-23";
+  src = fetchFromGitHub {
+    owner = "nim-lang";
+    repo = "db_connector";
+    rev = "e65693709dd042bc723c8f1d46cc528701f1c479";
+    hash = "sha256-g5X51VbES8OxR5m9WexK70Yo6S2PnroKLabj1cUu1P0=";
+  };
+  doCheck = false; # tests only worked in the Nim sources
+  meta = final.src.meta // {
+    description = "Unified db connector in Nim";
+    homepage = "https://github.com/nim-lang/db_connector";
+    license = [ lib.licenses.mit ];
+    maintainers = with lib.maintainers; [ ehmry ];
+  };
+})

pkgs/top-level/nim-packages.nix

···
 
     coap = callPackage  ../development/nim-packages/coap { };
 
+    db_connector = callPackage ../development/nim-packages/db_connector { };
+
     docopt = callPackage ../development/nim-packages/docopt { };
 
     eris = callPackage ../development/nim-packages/eris { };