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/servers/ursadb/default.nix

@@ -0,0 +1,46 @@
+{ lib, stdenv, fetchFromGitHub, cmake, zeromq, cppzmq }:
+
+stdenv.mkDerivation rec {
+  pname = "ursadb";
+  version = "1.2.0";
+
+  src = fetchFromGitHub {
+    owner = "CERT-Polska";
+    repo = "ursadb";
+    rev = "v${version}";
+    hash = "sha256-/EK1CKJ0IR7fkKSpQkONbWcz6uhUoAwK430ljNYsV5U=";
+  };
+
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace \
+        "add_executable(ursadb_test Tests.cpp)" "" \
+      --replace \
+        "target_link_libraries(ursadb_test ursa)" ""
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp ursadb $out/bin/
+    cp ursadb_new $out/bin/
+    cp ursadb_trim $out/bin/
+  '';
+
+  nativeBuildInputs = [
+    cmake
+  ];
+
+  buildInputs = [
+    zeromq
+    cppzmq
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/CERT-Polska/ursadb";
+    description = "Trigram database written in C++, suited for malware indexing";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ msm ];
+    platforms = platforms.unix;
+    broken = stdenv.isDarwin;
+  };
+}