diff --git a/pkgs/applications/audio/gmu/default.nix b/pkgs/applications/audio/gmu/default.nix
index b2b9f5e34750..cc2b46cd6ace 100644
--- a/pkgs/applications/audio/gmu/default.nix
+++ b/pkgs/applications/audio/gmu/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl, SDL, SDL_gfx, SDL_image, tremor, flac, mpg123, libmikmod
+{lib, stdenv, fetchurl, fetchpatch, SDL, SDL_gfx, SDL_image, tremor, flac, mpg123, libmikmod
 , speex, ncurses
 , keymap ? "default"
 , conf ? "unknown"
@@ -13,6 +13,24 @@ stdenv.mkDerivation rec {
     sha256 = "03x0mc0xw2if0bpf0a15yprcyx1xccki039zvl2099dagwk6xskv";
   };
 
+  patches = [
+     # pull pending upstream inclusion fix for ncurses-6.3:
+     #  https://github.com/jhe2/gmu/pull/7
+     (fetchpatch {
+       name = "ncurses-6.3.patch";
+       url = "https://github.com/jhe2/gmu/commit/c8b3a10afee136feb333754ef6ec26383b11072f.patch";
+       sha256 = "0xp2j3jp8pkmv6yvnzi378m2dylbfsaqrsrkw7hbxw6kglzj399r";
+     })
+
+     # pull upstream fix for -fno-common toolchains like
+     # upstream gcc-10 of clang-13.
+     (fetchpatch {
+       name = "fno-common.patch";
+       url = "https://github.com/jhe2/gmu/commit/b705209f08ddfda141ad358ccd0c3d2d099be5e6.patch";
+       sha256 = "1ci2b8kz3r58rzmivlfhqjmcgqwlkwlzzhnyxlk36vmk240a3gqq";
+     })
+  ];
+
   buildInputs = [ SDL SDL_gfx SDL_image tremor flac mpg123 libmikmod speex ncurses ];
 
   makeFlags = [ "PREFIX=$(out)" ];