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/urn/default.nix

@@ -0,0 +1,63 @@
+{ lib, stdenv, fetchFromGitLab, buildEnv, makeWrapper, lua, luajit, readline
+, useLuaJit ? false
+, extraLibraries ? []
+}:
+
+let
+  version = "0.7.2";
+  # Build a sort of "union package" with all the native dependencies we
+  # have: Lua (or LuaJIT), readline, etc. Then, we can depend on this
+  # and refer to ${urn-rt} instead of ${lua}, ${readline}, etc.
+  urn-rt = buildEnv {
+    name = "urn-rt-${version}";
+    ignoreCollisions = true;
+    paths = if useLuaJit then
+              [ luajit readline ]
+            else
+              [ lua ];
+  };
+
+  inherit (lib) optionalString concatMapStringsSep;
+in
+
+stdenv.mkDerivation {
+  pname = "urn${optionalString (extraLibraries != []) "-with-libraries"}";
+  inherit version;
+
+  src = fetchFromGitLab {
+    owner = "urn";
+    repo = "urn";
+    rev = "v${version}";
+    sha256 = "0nclr3d8ap0y5cg36i7g4ggdqci6m5q27y9f26b57km8p266kcpy";
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+  # Any packages that depend on the compiler have a transitive
+  # dependency on the Urn runtime support.
+  propagatedBuildInputs = [ urn-rt ];
+
+  makeFlags = ["-B"];
+
+  installPhase = ''
+    mkdir -p $out/bin $out/lib
+    install -m 0755 bin/urn.lua $out/bin/urn
+    cp -r lib $out/lib/urn
+    wrapProgram $out/bin/urn \
+      --add-flags "-i $out/lib/urn --prelude $out/lib/urn/prelude.lisp" \
+      --add-flags "${concatMapStringsSep " " (x: "-i ${x.libraryPath}") extraLibraries}" \
+      --prefix PATH : ${urn-rt}/bin/ \
+      --prefix LD_LIBRARY_PATH : ${urn-rt}/lib/
+  '';
+
+  meta = with lib; {
+    homepage = "https://urn-lang.com";
+    description = "Yet another Lisp variant which compiles to Lua";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ CrazedProgrammer ];
+    platforms = platforms.all;
+  };
+
+  passthru = {
+    inherit urn-rt;
+  };
+}