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/text/ledger2beancount/default.nix

@@ -0,0 +1,59 @@
+{ lib, stdenv, fetchFromGitHub, makeWrapper, perlPackages, beancount }:
+
+with lib;
+
+let
+  perlDeps = with perlPackages; [
+    DateCalc
+    DateTimeFormatStrptime
+    enum
+    FileBaseDir
+    GetoptLongDescriptive
+    ListMoreUtils
+    RegexpCommon
+    StringInterpolate
+    YAMLLibYAML
+  ];
+
+in stdenv.mkDerivation rec {
+  pname = "ledger2beancount";
+  version = "2.6";
+
+  src = fetchFromGitHub {
+    owner = "beancount";
+    repo = "ledger2beancount";
+    rev = version;
+    sha256 = "sha256-0Br+zuSUYrNP+ZL/FtNoaYoYBYho5kVfxu0tqKJSuBk=";
+  };
+
+  dontBuild = true;
+
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ perlPackages.perl beancount ] ++ perlDeps;
+
+  makeFlags = [ "prefix=$(out)" ];
+  installFlags = [ "INSTALL=install" ];
+
+  installPhase = ''
+    mkdir -p $out
+    cp -r $src/bin $out/bin
+  '';
+
+  postFixup = ''
+    wrapProgram "$out/bin/ledger2beancount" \
+      --set PERL5LIB "${perlPackages.makeFullPerlPath perlDeps}"
+  '';
+
+  meta = {
+    description = "Ledger to Beancount text-based converter";
+    longDescription = ''
+      A script to automatically convert Ledger-based textual ledgers to Beancount ones.
+
+      Conversion is based on (concrete) syntax, so that information that is not meaningful for accounting reasons but still valuable (e.g., comments, formatting, etc.) can be preserved.
+    '';
+    homepage = "https://github.com/beancount/ledger2beancount";
+    license = licenses.gpl3Plus;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ pablovsky ];
+  };
+}