zfstools: cleanup fetcher and meta

pkgs/by-name/zf/zfstools/package.nix

@@ -13,10 +13,10 @@ stdenv.mkDerivation (finalAttrs: {
   version = "0.3.6";
 
   src = fetchFromGitHub {
-    sha256 = "16lvw3xbmxp2pr8nixqn7lf4504zaaxvbbdnjkv4dggwd4lsdjyg";
-    rev = "v${finalAttrs.version}";
-    repo = "zfstools";
     owner = "bdrewery";
+    repo = "zfstools";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-z8umKWn8vUb2lLattbtSn4BCHD0W92hRvuL2uvrgm5o=";
   };
 
   buildInputs = [ ruby ];
@@ -36,9 +36,8 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   meta = {
-    inherit (finalAttrs) version;
-    inherit (finalAttrs.src.meta) homepage;
     description = "OpenSolaris-compatible auto-snapshotting script for ZFS";
+    homepage = "https://github.com/bdrewery/zfstools";
     longDescription = ''
       zfstools is an OpenSolaris-like and compatible auto snapshotting script
       for ZFS, which also supports auto snapshotting mysql databases.