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/development/compilers/sagittarius-scheme/default.nix

@@ -0,0 +1,59 @@
+{ lib, stdenv
+, fetchurl
+, cmake
+, pkg-config
+, libffi
+, boehmgc
+, openssl
+, zlib
+, odbcSupport ? true
+, libiodbc
+}:
+
+let platformLdLibraryPath = if stdenv.isDarwin then "DYLD_FALLBACK_LIBRARY_PATH"
+                            else if (stdenv.isLinux or stdenv.isBSD) then "LD_LIBRARY_PATH"
+                            else throw "unsupported platform";
+in
+stdenv.mkDerivation rec {
+  pname = "sagittarius-scheme";
+  version = "0.9.8";
+  src = fetchurl {
+    url = "https://bitbucket.org/ktakashi/${pname}/downloads/sagittarius-${version}.tar.gz";
+    sha256 = "sha256-CdnBpTq+c04JdipfhIiI8EkVFsCc00Gh+cA5zYENMqI=";
+  };
+  preBuild = ''
+           # since we lack rpath during build, need to explicitly add build path
+           # to LD_LIBRARY_PATH so we can load libsagittarius.so as required to
+           # build extensions
+           export ${platformLdLibraryPath}="$(pwd)/build"
+           '';
+  nativeBuildInputs = [ pkg-config cmake ];
+
+  buildInputs = [ libffi boehmgc openssl zlib ] ++ lib.optional odbcSupport libiodbc;
+
+  meta = with lib; {
+    broken = stdenv.isDarwin;
+    description = "An R6RS/R7RS Scheme system";
+    longDescription = ''
+      Sagittarius Scheme is a free Scheme implementation supporting
+      R6RS/R7RS specification.
+
+      Features:
+
+      -  Builtin CLOS.
+      -  Common Lisp like reader macro.
+      -  Cryptographic libraries.
+      -  Customisable cipher and hash algorithm.
+      -  Custom codec mechanism.
+      -  CL like keyword lambda syntax (taken from Gauche).
+      -  Constant definition form. (define-constant form).
+      -  Builtin regular expression
+      -  mostly works O(n)
+      -  Replaceable reader
+    '';
+    homepage = "https://bitbucket.org/ktakashi/sagittarius-scheme";
+    license = licenses.bsd2;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ abbe ];
+  };
+}