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/graphics/ldgallery/compiler/default.nix

@@ -0,0 +1,37 @@
+# generated with cabal2nix by ./generate.sh
+{ mkDerivation, aeson, base, cmdargs, containers, data-ordlist
+, directory, fetchgit, filepath, Glob, hpack, parallel-io, process
+, safe, lib, text, time, yaml
+}:
+mkDerivation {
+  pname = "ldgallery-compiler";
+  version = "2.0";
+  src = fetchgit {
+    url = "https://github.com/pacien/ldgallery.git";
+    sha256 = "1a82wy6ns1434gdba2l04crvr5waf03y02bappcxqci2cfb1cznz";
+    rev = "e93f7b1eb84c083d67567115284c0002a3a7d5fc";
+    fetchSubmodules = true;
+  };
+  postUnpack = "sourceRoot+=/compiler; echo source root reset to $sourceRoot";
+  isLibrary = true;
+  isExecutable = true;
+  enableSeparateDataOutput = true;
+  libraryHaskellDepends = [
+    aeson base cmdargs containers data-ordlist directory filepath Glob
+    parallel-io process safe text time yaml
+  ];
+  libraryToolDepends = [ hpack ];
+  executableHaskellDepends = [
+    aeson base cmdargs containers data-ordlist directory filepath Glob
+    parallel-io process safe text time yaml
+  ];
+  testHaskellDepends = [
+    aeson base cmdargs containers data-ordlist directory filepath Glob
+    parallel-io process safe text time yaml
+  ];
+  prePatch = "hpack";
+  homepage = "https://ldgallery.pacien.org";
+  description = "A static generator which turns a collection of tagged pictures into a searchable web gallery";
+  license = lib.licenses.agpl3;
+  maintainers = with lib.maintainers; [ pacien ];
+}

pkgs/tools/graphics/ldgallery/compiler/generate.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p cabal2nix
+
+set -euo pipefail
+
+if [ "$#" -ne 1 ] || [[ "$1" == -* ]]; then
+  echo "Regenerates the nix file for the ldgallery-compiler package."
+  echo "Usage: $0 <git release tag>"
+  exit 1
+fi
+
+echo "# generated with cabal2nix by ./generate.sh" > default.nix
+
+cabal2nix \
+  --maintainer pacien \
+  --subpath compiler \
+  --revision $1 \
+  "https://github.com/pacien/ldgallery.git" \
+  >> default.nix