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/redprl/default.nix

@@ -0,0 +1,37 @@
+{ lib, stdenv, fetchFromGitHub, mlton }:
+
+stdenv.mkDerivation {
+  pname = "redprl";
+  version = "unstable-2019-11-04";
+
+  src = fetchFromGitHub {
+    owner = "RedPRL";
+    repo = "sml-redprl";
+    rev = "c72190de76f7ed1cfbe1d2046c96e99ac5022b0c";
+    fetchSubmodules = true;
+    sha256 = "sha256-xrQT5o0bsIN+mCYUOz9iY4+j3HGROb1I6R2ADcLy8n4=";
+  };
+
+  buildInputs = [ mlton ];
+
+  postPatch = ''
+    patchShebangs ./script/
+  '';
+
+  buildPhase = ''
+    ./script/mlton.sh
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    mv ./bin/redprl $out/bin
+  '';
+
+  meta = with lib; {
+    description = "A proof assistant for Nominal Computational Type Theory";
+    homepage = "http://www.redprl.org/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ acowley ];
+    platforms = platforms.unix;
+  };
+}