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/logic/mcy/default.nix

@@ -0,0 +1,51 @@
+{ lib, stdenv, fetchFromGitHub
+, yosys, symbiyosys, python3
+}:
+
+let
+  python = python3.withPackages (p: with p; [ flask ]);
+in
+stdenv.mkDerivation {
+  pname = "mcy";
+  version = "2020.08.03";
+
+  src = fetchFromGitHub {
+    owner  = "YosysHQ";
+    repo   = "mcy";
+    rev    = "62048e69df13f8e03670424626755ae8ef4c36ff";
+    sha256 = "15xxgzx1zxzx5kshqyrxnfx33cz6cjzxcdcn6z98jhs9bwyvf96f";
+  };
+
+  buildInputs = [ python ];
+  patchPhase = ''
+    chmod +x scripts/create_mutated.sh
+    patchShebangs .
+
+    substituteInPlace mcy.py \
+      --replace yosys '${yosys}/bin/yosys' \
+      --replace 'os.execvp("mcy-dash"' "os.execvp(\"$out/bin/mcy-dash\""
+    substituteInPlace mcy-dash.py \
+      --replace 'app.run(debug=True)' 'app.run(host="0.0.0.0",debug=True)' \
+      --replace 'subprocess.Popen(["mcy"' "subprocess.Popen([\"$out/bin/mcy\""
+    substituteInPlace scripts/create_mutated.sh \
+      --replace yosys '${yosys}/bin/yosys'
+  '';
+
+  # the build needs a bit of work...
+  buildPhase = "true";
+  installPhase = ''
+    mkdir -p $out/bin $out/share/mcy/{dash,scripts}
+    install mcy.py      $out/bin/mcy      && chmod +x $out/bin/mcy
+    install mcy-dash.py $out/bin/mcy-dash && chmod +x $out/bin/mcy-dash
+    cp -r dash/.    $out/share/mcy/dash/.
+    cp -r scripts/. $out/share/mcy/scripts/.
+  '';
+
+  meta = {
+    description = "Mutation-based coverage testing for hardware designs, with Yosys";
+    homepage    = "https://github.com/YosysHQ/mcy";
+    license     = lib.licenses.isc;
+    maintainers = with lib.maintainers; [ thoughtpolice ];
+    platforms   = lib.platforms.all;
+  };
+}