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/monitoring/zabbix/agent.nix

@@ -0,0 +1,43 @@
+{ lib, stdenv, fetchurl, pkg-config, libiconv, openssl, pcre }:
+
+import ./versions.nix ({ version, sha256 }:
+  stdenv.mkDerivation {
+    pname = "zabbix-agent";
+    inherit version;
+
+    src = fetchurl {
+      url = "https://cdn.zabbix.com/zabbix/sources/stable/${lib.versions.majorMinor version}/zabbix-${version}.tar.gz";
+      inherit sha256;
+    };
+
+    nativeBuildInputs = [ pkg-config ];
+    buildInputs = [
+      libiconv
+      openssl
+      pcre
+    ];
+
+    configureFlags = [
+      "--enable-agent"
+      "--enable-ipv6"
+      "--with-iconv"
+      "--with-libpcre"
+      "--with-openssl=${openssl.dev}"
+    ];
+    makeFlags = [
+      "AR:=$(AR)"
+      "RANLIB:=$(RANLIB)"
+    ];
+
+    postInstall = ''
+      cp conf/zabbix_agentd/*.conf $out/etc/zabbix_agentd.conf.d/
+    '';
+
+    meta = with lib; {
+      description = "An enterprise-class open source distributed monitoring solution (client-side agent)";
+      homepage = "https://www.zabbix.com/";
+      license = licenses.gpl2;
+      maintainers = with maintainers; [ mmahut psyanticy ];
+      platforms = platforms.linux;
+    };
+  })