rsstail: don't run cppcheck linter, little cleanup

pkgs/applications/networking/feedreaders/rsstail/default.nix

···
-{ lib, stdenv, fetchFromGitHub, cppcheck, libmrss, libiconv }:
+{ lib, stdenv, fetchFromGitHub, libmrss, libiconv }:
 
 stdenv.mkDerivation {
   pname = "rsstail";
   version = "2.1";
 
   src = fetchFromGitHub {
-    sha256 = "12p69i3g1fwlw0bds9jqsdmzkid3k5a41w31d227i7vm12wcvjf6";
+    owner = "folkertvanheusden";
+    repo = "rsstail";
     rev = "6f2436185372b3f945a4989406c4b6a934fe8a95";
-    repo = "rsstail";
-    owner = "folkertvanheusden";
+    sha256 = "12p69i3g1fwlw0bds9jqsdmzkid3k5a41w31d227i7vm12wcvjf6";
   };
 
   buildInputs = [ libmrss ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
-  nativeCheckInputs = [ cppcheck ];
 
   postPatch = ''
     substituteInPlace Makefile --replace -liconv_hook ""
···
   makeFlags = [ "prefix=$(out)" ];
   enableParallelBuilding = true;
 
-  doCheck = true;
+  # just runs cppcheck linter
+  doCheck = false;
 
   meta = with lib; {
     description = "Monitor RSS feeds for new entries";
···
       RSSTail is more or less an RSS reader: it monitors an RSS feed and if it
       detects a new entry it'll emit only that new entry.
     '';
-    homepage = "http://www.vanheusden.com/rsstail/";
+    homepage = "https://www.vanheusden.com/rsstail/";
     license = licenses.gpl2Plus;
     maintainers = [ maintainers.Necior ];
     platforms = platforms.unix;