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/tools/haskell/dconf2nix/dconf2nix.nix

@@ -0,0 +1,24 @@
+{ mkDerivation, base, containers, fetchFromGitHub, hedgehog, lib
+, optparse-applicative, parsec, template-haskell, text
+}:
+mkDerivation {
+  pname = "dconf2nix";
+  version = "0.0.11";
+  src = fetchFromGitHub {
+    owner = "gvolpe";
+    repo = "dconf2nix";
+    rev = "fe7e3d973caa87b1b706096aff3d670f65e39fda";
+    sha256 = "sha256-zuhiFVA8LvFKOPMMvqFu+ofv0CrIl2pMZbPQE/tCaM8=";
+  };
+  isLibrary = true;
+  isExecutable = true;
+  libraryHaskellDepends = [
+    base containers optparse-applicative parsec text
+  ];
+  executableHaskellDepends = [ base ];
+  testHaskellDepends = [
+    base containers hedgehog parsec template-haskell text
+  ];
+  description = "Convert dconf files to Nix, as expected by Home Manager";
+  license = lib.licenses.asl20;
+}

pkgs/development/tools/haskell/dconf2nix/default.nix

@@ -0,0 +1,32 @@
+{ haskell, haskellPackages, lib, runCommand }:
+
+let
+  dconf2nix =
+    haskell.lib.compose.justStaticExecutables
+      (haskell.lib.compose.overrideCabal (oldAttrs: {
+        maintainers = (oldAttrs.maintainers or []) ++ [
+          lib.maintainers.gvolpe
+        ];
+      }) haskellPackages.dconf2nix);
+in
+
+dconf2nix.overrideAttrs (oldAttrs: {
+  passthru = (oldAttrs.passthru or {}) // {
+    updateScript = ./update.sh;
+
+    # These tests can be run with the following command.
+    #
+    # $ nix-build -A dconf2nix.passthru.tests
+    tests =
+      runCommand
+        "dconf2nix-tests"
+        {
+          nativeBuildInputs = [
+            dconf2nix
+          ];
+        }
+        ''
+          dconf2nix > $out
+        '';
+  };
+})

pkgs/development/tools/haskell/dconf2nix/update.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p cabal2nix curl jq
+#
+# This script will update the dconf2nix derivation to the latest version using
+# cabal2nix.
+
+set -eo pipefail
+
+# This is the directory of this update.sh script.
+script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+# dconf2nix derivation created with cabal2nix.
+dconf2nix_derivation_file="${script_dir}/dconf2nix.nix"
+
+# This is the current revision of dconf2nix in Nixpkgs.
+old_version="$(sed -En 's/.*\bversion = "(.*?)".*/\1/p' "$dconf2nix_derivation_file")"
+
+# This is the latest release version of dconf2nix on GitHub.
+new_version=$(curl --silent "https://api.github.com/repos/gvolpe/dconf2nix/releases" | jq '.[0].tag_name' --raw-output)
+
+echo "Updating dconf2nix from old version $old_version to new version $new_version."
+echo "Running cabal2nix and outputting to ${dconf2nix_derivation_file}..."
+
+cabal2nix --revision "$new_version" "https://github.com/gvolpe/dconf2nix.git" > "$dconf2nix_derivation_file"
+
+echo "Finished."