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/tools/filesystems/9pfs/default.nix

@@ -0,0 +1,42 @@
+{ lib, stdenv, fetchFromGitHub, fuse }:
+
+stdenv.mkDerivation {
+  pname = "9pfs";
+  version = "unstable-2015-09-18";
+
+  src = fetchFromGitHub {
+    owner = "mischief";
+    repo = "9pfs";
+    rev = "7f4ca4cd750d650c1215b92ac3cc2a28041960e4";
+    sha256 = "007s2idsn6bspmfxv1qabj39ggkgvn6gwdbhczwn04lb4c6gh3xc";
+  };
+
+  # Upstream development has stopped and is no longer accepting patches
+  # https://github.com/mischief/9pfs/pull/3
+  patches = [ ./fix-darwin-build.patch ];
+
+  preConfigure =
+    ''
+      substituteInPlace Makefile --replace '-g bin' ""
+      installFlagsArray+=(BIN=$out/bin MAN=$out/share/man/man1)
+      mkdir -p $out/bin $out/share/man/man1
+    '';
+
+  buildInputs = [ fuse ];
+
+  # Workaround build failure on -fno-common toolchains like upstream
+  # gcc-10. Otherwise build fails as:
+  #   ld: lib/auth_rpc.o:/build/source/lib/../9pfs.h:35: multiple definition of
+  #     `logfile'; 9pfs.o:/build/source/9pfs.h:35: first defined here
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
+  enableParallelBuilding = true;
+
+  meta = {
+    homepage = "https://github.com/mischief/9pfs";
+    description = "FUSE-based client of the 9P network filesystem protocol";
+    maintainers = [ lib.maintainers.eelco ];
+    platforms = lib.platforms.unix;
+    license = with lib.licenses; [ lpl-102 bsd2 ];
+  };
+}