file: fix detection of mimetype of xz files (#132809)

pkgs/tools/misc/file/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, file, zlib, libgnurx }:
+{ lib, stdenv, fetchurl, file, zlib, libgnurx, fetchpatch }:
 
 stdenv.mkDerivation rec {
   pname = "file";
@@ -16,6 +16,14 @@ stdenv.mkDerivation rec {
   buildInputs = [ zlib ]
               ++ lib.optional stdenv.hostPlatform.isWindows libgnurx;
 
+  patches = [
+    # Fix the mime type detection of xz file. Is merged in master.
+    (fetchpatch {
+      url = "https://github.com/file/file/commit/9b0459afab309a82aa4e46f73a4e50dd641f3d39.patch";
+      sha256 = "sha256-6vjyIn5gVbgmhUlfXJKFRVltm8YKATKmh0/X6+2lLnM=";
+    })
+  ];
+
   doCheck = true;
 
   makeFlags = lib.optional stdenv.hostPlatform.isWindows "FILE_COMPILE=file";