dnstracer: move to by-name

pkgs/by-name/dn/dnstracer/package.nix

@@ -2,7 +2,7 @@
   lib,
   stdenv,
   fetchurl,
-  libresolv,
+  darwin,
   perl,
 }:
 
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     install -Dm755 -t $man/share/man/man8 dnstracer.8
   '';
 
-  buildInputs = [ ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libresolv ];
+  buildInputs = [ ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.libresolv ];
 
   NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-lresolv";
 

pkgs/top-level/all-packages.nix

@@ -15957,10 +15957,6 @@ with pkgs;
 
   compressDrvWeb = callPackage ../build-support/compress-drv/web.nix { };
 
-  dnstracer = callPackage ../tools/networking/dnstracer {
-    inherit (darwin) libresolv;
-  };
-
   diceware = with python3Packages; toPythonApplication diceware;
 
   xml2rfc = with python3Packages; toPythonApplication xml2rfc;