keepassxc: fix 4.9 compatibility

pkgs/applications/misc/keepassx/community.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub,
+{ stdenv, fetchFromGitHub, fetchpatch,
   cmake, libgcrypt, zlib, libmicrohttpd, libXtst, qtbase, qttools, libgpgerror
 , withKeePassHTTP ? true
 }:
@@ -16,6 +16,13 @@ stdenv.mkDerivation rec {
     sha256 = "1znnw2xpv58x0rbpmm4y662377mbmcilhf8mhhjsz8vhahms33a8";
   };
 
+  patches = [
+    (fetchpatch { # qt 4.9
+      url = "https://github.com/keepassxreboot/keepassxc/commit/2b6059dee3a95591d787e8b8c931cd68c059d43f.patch";
+      sha256 = "1v140z358rk75f7wsqawpai3x8v8qcqalnv9r0l1d4p1gxm1j766";
+    })
+  ];
+
   cmakeFlags = optional (withKeePassHTTP) [ "-DWITH_XC_HTTP=ON" ];
 
   buildInputs = [ cmake libgcrypt zlib qtbase qttools libXtst libmicrohttpd libgpgerror ];