diff --git a/hosts/hainich/services/murmur.nix b/hosts/hainich/services/murmur.nix
index 67986af..3896667 100644
--- a/hosts/hainich/services/murmur.nix
+++ b/hosts/hainich/services/murmur.nix
@@ -1,14 +1,13 @@
 { config, lib, pkgs, ... }:
 
+let
+  sources = import ../../../nix/sources.nix;
+in
 
 let
   mumblesite = pkgs.stdenv.mkDerivation {
     name = "mumble.hacc.space-website";
-    src = pkgs.fetchgit {
-      url = "https://gitlab.infra4future.de/hacc/infra4future/mumble.infra4future.de";
-      rev = "8949bd21346bc55175957ffb179d25ea00be4d01";
-      sha256 = "09qpszhxdkgkspcl6n7djgabp5km1s9v0rqb31wmm7fai9zkgmq3";
-    };
+    src = sources.mumble-website.outPath.outPath;
     buildPhase = ''
       ${pkgs.jekyll.outPath}/bin/jekyll build
     '';