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/libraries/xapian/default.nix

@@ -0,0 +1,42 @@
+{ lib, stdenv, fetchurl, autoreconfHook
+, libuuid, zlib }:
+
+let
+  generic = version: sha256: stdenv.mkDerivation {
+    pname = "xapian";
+    inherit version;
+    passthru = { inherit version; };
+
+    src = fetchurl {
+      url = "https://oligarchy.co.uk/xapian/${version}/xapian-core-${version}.tar.xz";
+      inherit sha256;
+    };
+
+    outputs = [ "out" "man" "doc" ];
+
+    buildInputs = [ libuuid zlib ];
+    nativeBuildInputs = [ autoreconfHook ];
+
+    doCheck = true;
+    AUTOMATED_TESTING = true; # https://trac.xapian.org/changeset/8be35f5e1/git
+
+    patches = lib.optionals stdenv.isDarwin [ ./skip-flaky-darwin-test.patch ];
+
+    # the configure script thinks that Darwin has ___exp10
+    # but it’s not available on my systems (or hydra apparently)
+    postConfigure = lib.optionalString stdenv.isDarwin ''
+      substituteInPlace config.h \
+        --replace "#define HAVE___EXP10 1" "#undef HAVE___EXP10"
+    '';
+
+    meta = with lib; {
+      description = "Search engine library";
+      homepage = "https://xapian.org/";
+      license = licenses.gpl2Plus;
+      maintainers = with maintainers; [ ];
+      platforms = platforms.unix;
+    };
+  };
+in {
+  xapian_1_4 = generic "1.4.19" "sha256-H8pI/KbMNSbMS6k90ZT+nBMmhXt47c+zfmjQhtcUqcM=";
+}