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/shells/bash/yarn-completion/default.nix

@@ -0,0 +1,35 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, installShellFiles
+}:
+
+stdenv.mkDerivation rec {
+  pname = "yarn-bash-completion";
+  version = "0.17.0";
+
+  src = fetchFromGitHub {
+    owner = "dsifford";
+    repo = "yarn-completion";
+    rev = "v${version}";
+    sha256 = "0xflbrbwskjqv3knvc8jqygpvfxh5ak66q7w22d1ng8gwrfqzcng";
+  };
+
+  strictDeps = true;
+  nativeBuildInputs = [ installShellFiles ];
+
+  installPhase = ''
+    runHook preInstall
+
+    installShellCompletion --cmd yarn ./yarn-completion.bash
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/dsifford/yarn-completion/";
+    description = "Bash completion for Yarn";
+    license = licenses.mit;
+    maintainers = with maintainers; [ DamienCassou ];
+  };
+}