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/varnish/default.nix

@@ -0,0 +1,59 @@
+{ lib, stdenv, fetchurl, fetchpatch, pcre, pcre2, jemalloc, libxslt, groff, ncurses, pkg-config, readline, libedit
+, coreutils, python3, makeWrapper }:
+
+let
+  common = { version, sha256, extraNativeBuildInputs ? [] }:
+    stdenv.mkDerivation rec {
+      pname = "varnish";
+      inherit version;
+
+      src = fetchurl {
+        url = "https://varnish-cache.org/_downloads/${pname}-${version}.tgz";
+        inherit sha256;
+      };
+
+      passthru.python = python3;
+
+      nativeBuildInputs = with python3.pkgs; [ pkg-config docutils sphinx ];
+      buildInputs = [
+        libxslt groff ncurses readline libedit makeWrapper python3
+      ]
+      ++ lib.optional (lib.versionOlder version "7") pcre
+      ++ lib.optional (lib.versionAtLeast version "7") pcre2
+      ++ lib.optional stdenv.hostPlatform.isLinux jemalloc;
+
+      buildFlags = [ "localstatedir=/var/spool" ];
+
+      postPatch = ''
+        substituteInPlace bin/varnishtest/vtc_main.c --replace /bin/rm "${coreutils}/bin/rm"
+      '';
+
+      postInstall = ''
+        wrapProgram "$out/sbin/varnishd" --prefix PATH : "${lib.makeBinPath [ stdenv.cc ]}"
+      '';
+
+      # https://github.com/varnishcache/varnish-cache/issues/1875
+      NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isi686 "-fexcess-precision=standard";
+
+      outputs = [ "out" "dev" "man" ];
+
+      meta = with lib; {
+        broken = stdenv.isDarwin;
+        description = "Web application accelerator also known as a caching HTTP reverse proxy";
+        homepage = "https://www.varnish-cache.org";
+        license = licenses.bsd2;
+        maintainers = with maintainers; [ fpletz ];
+        platforms = platforms.unix;
+      };
+    };
+in
+{
+  varnish60 = common {
+    version = "6.0.10";
+    sha256 = "1sr60wg5mzjb14y75cga836f19sbmmpgh13mwc4alyg3irsbz1bb";
+  };
+  varnish71 = common {
+    version = "7.1.0";
+    sha256 = "1flyqr212jamqpwafdil170vc966r1mbb7n3ngjn8xk6hn3bhjpm";
+  };
+}