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/development/compilers/crystal2nix/default.nix

@@ -0,0 +1,36 @@
+{ lib, fetchFromGitHub, crystal, makeWrapper, nix-prefetch-git }:
+
+crystal.buildCrystalPackage rec {
+  pname = "crystal2nix";
+  version = "0.1.1";
+
+  src = fetchFromGitHub {
+    owner = "peterhoeg";
+    repo = "crystal2nix";
+    rev = "v${version}";
+    sha256 = "sha256-LKZychkhWy/rVdrP3Yo6g8CL1pGdiZlBykzFjnWh0fg=";
+  };
+
+  format = "shards";
+
+  shardsFile = ./shards.nix;
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  postInstall = ''
+    wrapProgram $out/bin/crystal2nix \
+      --prefix PATH : ${lib.makeBinPath [ nix-prefetch-git ]}
+  '';
+
+  # temporarily off. We need the checks to execute the wrapped binary
+  doCheck = false;
+
+  # it requires an internet connection when run
+  doInstallCheck = false;
+
+  meta = with lib; {
+    description = "Utility to convert Crystal's shard.lock files to a Nix file";
+    license = licenses.mit;
+    maintainers = with maintainers; [ manveru peterhoeg ];
+  };
+}