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/os-specific/linux/open-iscsi/default.nix

@@ -0,0 +1,54 @@
+{ lib, stdenv, fetchFromGitHub, automake, autoconf, libtool, gettext
+, util-linux, open-isns, openssl, kmod, perl, systemd, pkgconf, nixosTests
+}:
+
+stdenv.mkDerivation rec {
+  pname = "open-iscsi";
+  version = "2.1.4";
+
+  nativeBuildInputs = [ autoconf automake gettext libtool perl pkgconf ];
+  buildInputs = [ kmod open-isns.lib openssl systemd util-linux ];
+
+  src = fetchFromGitHub {
+    owner = "open-iscsi";
+    repo = "open-iscsi";
+    rev = version;
+    sha256 = "sha256-HnvLLwxOnu7Oiige6A6zk9NmAI2ImcILp9eCfbdGiyI=";
+  };
+
+  DESTDIR = "$(out)";
+
+  NIX_LDFLAGS = "-lkmod -lsystemd";
+  NIX_CFLAGS_COMPILE = "-DUSE_KMOD";
+
+  preConfigure = ''
+    sed -i 's|/usr|/|' Makefile
+  '';
+
+  installFlags = [
+    "install"
+    "install_systemd"
+  ];
+
+  postInstall = ''
+    cp usr/iscsistart $out/sbin/
+    for f in $out/lib/systemd/system/*; do
+      substituteInPlace $f --replace /sbin $out/bin
+    done
+    $out/sbin/iscsistart -v
+  '';
+
+  postFixup = ''
+    sed -i "s|/sbin/iscsiadm|$out/bin/iscsiadm|" $out/bin/iscsi_fw_login
+  '';
+
+  passthru.tests = { inherit (nixosTests) iscsi-root iscsi-multipath-root; };
+
+  meta = with lib; {
+    description = "A high performance, transport independent, multi-platform implementation of RFC3720";
+    license = licenses.gpl2Plus;
+    homepage = "https://www.open-iscsi.com";
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ cleverca22 zaninime ];
+  };
+}