uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/tools/misc/wemux/default.nix

@@ -0,0 +1,38 @@
+{ stdenv, lib, fetchFromGitHub, tmux, installShellFiles }:
+
+stdenv.mkDerivation rec {
+  pname = "wemux";
+  version = "unstable-2021-04-16";
+
+  src = fetchFromGitHub {
+    owner = "zolrath";
+    repo = "wemux";
+    rev = "01c6541f8deceff372711241db2a13f21c4b210c";
+    sha256 = "1y962nzvs7sf720pl3wa582l6irxc8vavd0gp4ag4243b2gs4qvm";
+  };
+
+  nativeBuildInputs = [ installShellFiles ];
+
+  installPhase = ''
+    runHook preInstall
+
+    substituteInPlace wemux \
+        --replace tmux ${tmux}/bin/tmux \
+        --replace "/usr/local/etc" "/etc"
+
+    substituteInPlace man/wemux.1 --replace "/usr/local/etc" "/etc"
+
+    install -Dm755 wemux -t $out/bin
+    installManPage man/wemux.1
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/zolrath/wemux";
+    description = "Multi-user tmux made easy";
+    license = licenses.mit;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ bsima ];
+  };
+}