diff --git a/patches/239313.patch b/patches/239313.patch
new file mode 100644
index 00000000..abc51793
--- /dev/null
+++ b/patches/239313.patch
@@ -0,0 +1,20 @@
+diff --git a/pkgs/tools/networking/mu/default.nix b/pkgs/tools/networking/mu/default.nix
+index 891a42ae1cdce..8ea4a628f87d3 100644
+--- a/pkgs/tools/networking/mu/default.nix
++++ b/pkgs/tools/networking/mu/default.nix
+@@ -14,13 +14,13 @@
+ 
+ stdenv.mkDerivation rec {
+   pname = "mu";
+-  version = "1.10.3";
++  version = "1.10.4";
+ 
+   src = fetchFromGitHub {
+     owner = "djcb";
+     repo = "mu";
+     rev = "v${version}";
+-    hash = "sha256-AqIPdKdNKLnAHIlqgs8zzm7j+iwNvDFWslvp8RjQPnI=";
++    hash = "sha256-vwStqrw/fPYUpBhBsLX0MPXtBtP5LwU0AYmUbP+Ywgo=";
+   };
+ 
+   postPatch = ''