diff --git a/pkgs/development/libraries/umockdev/default.nix b/pkgs/development/libraries/umockdev/default.nix
index 0bc817cde299..9c3026b0c9fb 100644
--- a/pkgs/development/libraries/umockdev/default.nix
+++ b/pkgs/development/libraries/umockdev/default.nix
@@ -2,6 +2,7 @@
 , lib
 , docbook-xsl-nons
 , fetchurl
+, fetchpatch
 , glib
 , gobject-introspection
 , gtk-doc
@@ -42,6 +43,12 @@ stdenv.mkDerivation (finalAttrs: {
       src = ./substitute-udevadm.patch;
       udevadm = "${systemdMinimal}/bin/udevadm";
     })
+
+    (fetchpatch {
+      name = "musl.patch";
+      url = "https://github.com/martinpitt/umockdev/commit/d4efe24be59bd859b87473ea3d7efe8100bedc74.patch";
+      hash = "sha256-whf3p2e7FWN1xk5+HF9KsbMW74DPOQ0R0+FxBfCZTX0=";
+    })
   ];
 
   nativeBuildInputs = [