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/ott/default.nix

@@ -0,0 +1,45 @@
+{ lib, stdenv, fetchFromGitHub, pkg-config, ocaml, opaline }:
+
+stdenv.mkDerivation rec {
+  pname = "ott";
+  version = "0.32";
+
+  src = fetchFromGitHub {
+    owner = "ott-lang";
+    repo = "ott";
+    rev = version;
+    sha256 = "sha256-vdDsfsIi1gRW1Sowf29VyQ4C5UKyQZaVgS2uTb8VeW4=";
+  };
+
+  nativeBuildInputs = [ pkg-config opaline ];
+  buildInputs = [ ocaml ];
+
+  installTargets = "ott.install";
+
+  postInstall = ''
+    opaline -prefix $out
+  ''
+  # There is `emacsPackages.ott-mode` for this now.
+  + ''
+    rm -r $out/share/emacs
+  '';
+
+  meta = {
+    description = "A tool for the working semanticist";
+    longDescription = ''
+      Ott is a tool for writing definitions of programming languages and
+      calculi. It takes as input a definition of a language syntax and
+      semantics, in a concise and readable ASCII notation that is close to
+      what one would write in informal mathematics. It generates LaTeX to
+      build a typeset version of the definition, and Coq, HOL, and Isabelle
+      versions of the definition. Additionally, it can be run as a filter,
+      taking a LaTeX/Coq/Isabelle/HOL source file with embedded (symbolic)
+      terms of the defined language, parsing them and replacing them by
+      target-system terms.
+    '';
+    homepage = "http://www.cl.cam.ac.uk/~pes20/ott";
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ jwiegley ];
+    platforms = lib.platforms.unix;
+  };
+}