diff --git a/pkgs/by-name/wi/wily/package.nix b/pkgs/by-name/wi/wily/package.nix
index fc4867590c7e..197f31c1baf4 100644
--- a/pkgs/by-name/wi/wily/package.nix
+++ b/pkgs/by-name/wi/wily/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchurl,
+  fetchDebianPatch,
   libx11,
   libxt,
 }:
@@ -20,7 +21,16 @@ stdenv.mkDerivation (finalAttrs: {
     libxt
   ];
 
-  patches = [ ./fix-gcc14-build.patch ];
+  patches = [
+    ./fix-gcc14-build.patch
+    (fetchDebianPatch {
+      pname = "wily";
+      version = "0.13.42";
+      debianRevision = "4";
+      patch = "gcc-15.patch";
+      hash = "sha256-PZZvn2G/1a4Hk0CMVdDK09vyIN9yQ3X4ToCENwYujFA=";
+    })
+  ];
 
   preInstall = ''
     mkdir -p $out/bin