diff --git a/mastodon.nix b/mastodon.nix
index f52697e..ab865f2 100644
--- a/mastodon.nix
+++ b/mastodon.nix
@@ -3,15 +3,16 @@
 let
   secrets = import ./secrets.nix;
 
+  mastodon-source = pkgs.callPackage "${toString pkgs.path}/pkgs/servers/mastodon/source.nix" {};
+
   mastodon-lor-sh = pkgs.mastodon.override {
     srcOverride = pkgs.applyPatches {
       src = pkgs.fetchgit {
-        url = "https://github.com/mastodon/mastodon.git";
-        rev = "v${pkgs.mastodon.version}";
-        # TODO get sha256 from nixpkgs/pkgs/servers/mastodon/source.nix
-        sha256 = "1c0mxz45pkgmyw81z025n1ps1dkdq92337h7sd865w2fbgmzg50l";
+        url = mastodon-source.src.url;
+        rev = mastodon-source.src.rev;
+        sha256 = mastodon-source.src.outputHash;
       };
-      patches =  [
+      patches = [
         ./patches/logo.patch
         ./patches/app-icon.patch
         ./patches/logo-symbol-wordmark.patch
@@ -28,12 +29,7 @@ let
 
         ./patches/simple-form.patch
         ./patches/not-so-scary-500.patch
-        # https://github.com/NixOS/nixpkgs/pull/223547
-        (pkgs.fetchpatch {
-          url = "https://github.com/mastodon/mastodon/commit/e7b81d7d9625893b1323e12215a2a98c0f19f58f.patch";
-          hash = "sha256-cF0wtbjTNbsyqHb3uy5zYFaACIcziJ2ulJpOT5VoDO0=";
-        })
-      ];
+      ] ++ mastodon-source.src.patches;
       postPatch = (import ./branding.nix { pkgs = pkgs; }).branding;
     };
   };