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/applications/science/math/numworks-epsilon/default.nix

@@ -0,0 +1,63 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, libpng
+, libjpeg
+, freetype
+, xorg
+, python3
+, imagemagick
+, gcc-arm-embedded
+, pkg-config
+}:
+
+stdenv.mkDerivation rec {
+  pname = "numworks-epsilon";
+  version = "15.5.0";
+
+  src = fetchFromGitHub {
+    owner = "numworks";
+    repo = "epsilon";
+    rev = version;
+    sha256 = "fPBO3FzZ4k5OxG+Ifc6R/au4Te974HNKAEdHz+aFdSg=";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [
+    libpng
+    libjpeg
+    freetype
+    xorg.libXext
+    python3
+    imagemagick
+    gcc-arm-embedded
+  ];
+
+  makeFlags = [
+    "PLATFORM=simulator"
+  ];
+
+  patches = [
+    # Remove make rule Introduced in cba596dde7
+    # which causes it to not build with nix
+    ./0001-ion-linux-makerules.patch
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mv ./output/release/simulator/linux/{epsilon.bin,epsilon}
+    mkdir -p $out/bin
+    cp -r ./output/release/simulator/linux/* $out/bin/
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Simulator for Epsilon, a High-performance graphing calculator operating system";
+    homepage = "https://numworks.com/";
+    license = licenses.cc-by-nc-sa-40;
+    maintainers = with maintainers; [ erikbackman ];
+    platforms = [ "x86_64-linux" ];
+  };
+}