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/package-management/akku/default.nix

@@ -0,0 +1,41 @@
+{ lib, stdenv, fetchFromGitLab, autoreconfHook, pkg-config, guile, curl, substituteAll }:
+
+stdenv.mkDerivation rec {
+  pname = "akku";
+  version = "1.1.0";
+
+  src = fetchFromGitLab {
+    owner = "akkuscm";
+    repo = "akku";
+    rev = "v${version}";
+    sha256 = "1pi18aamg1fd6f9ynfl7zx92052xzf0zwmhi2pwcwjs1kbah19f5";
+  };
+
+  patches = [
+    # substitute libcurl path
+    (substituteAll {
+      src = ./hardcode-libcurl.patch;
+      libcurl = "${curl.out}/lib/libcurl${stdenv.hostPlatform.extensions.sharedLibrary}";
+    })
+  ];
+
+  nativeBuildInputs = [ autoreconfHook pkg-config ];
+
+  buildInputs = [ guile ];
+
+  # Use a dummy package index to boostrap Akku
+  preBuild = ''
+    touch bootstrap.db
+  '';
+
+  makeFlags = [ "GUILE_AUTO_COMPILE=0" ];
+
+  meta = with lib; {
+    homepage = "https://akkuscm.org/";
+    description = "Language package manager for Scheme";
+    changelog = "https://gitlab.com/akkuscm/akku/-/raw/v${version}/NEWS.md";
+    platforms = platforms.all;
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ marsam ];
+  };
+}