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/agent2.nix

@@ -0,0 +1,66 @@
+{ lib, buildGoModule, fetchurl, autoreconfHook, pkg-config, libiconv, openssl, pcre, zlib }:
+
+import ./versions.nix ({ version, sha256 }:
+  buildGoModule {
+    pname = "zabbix-agent2";
+    inherit version;
+
+    src = fetchurl {
+      url = "https://cdn.zabbix.com/zabbix/sources/stable/${lib.versions.majorMinor version}/zabbix-${version}.tar.gz";
+      inherit sha256;
+    };
+
+    modRoot = "src/go";
+
+    vendorSha256 = "1417qi061xc4m55z0vz420fr7qpi24kw5yj9wq7iic92smakgkjn";
+
+    nativeBuildInputs = [ autoreconfHook pkg-config ];
+    buildInputs = [ libiconv openssl pcre zlib ];
+
+    inherit (buildGoModule.go) GOOS GOARCH;
+
+    # need to provide GO* env variables & patch for reproducibility
+    postPatch = ''
+      substituteInPlace src/go/Makefile.am \
+        --replace '`go env GOOS`' "$GOOS" \
+        --replace '`go env GOARCH`' "$GOARCH" \
+        --replace '`date +%H:%M:%S`' "00:00:00" \
+        --replace '`date +"%b %_d %Y"`' "Jan 1 1970"
+    '';
+
+    # manually configure the c dependencies
+    preConfigure = ''
+      ./configure \
+        --prefix=${placeholder "out"} \
+        --enable-agent2 \
+        --enable-ipv6 \
+        --with-iconv \
+        --with-libpcre \
+        --with-openssl=${openssl.dev}
+    '';
+
+    # zabbix build process is complex to get right in nix...
+    # use automake to build the go project ensuring proper access to the go vendor directory
+    buildPhase = ''
+      cd ../..
+      make
+    '';
+
+    installPhase = ''
+      mkdir -p $out/sbin
+
+      install -Dm0644 src/go/conf/zabbix_agent2.conf $out/etc/zabbix_agent2.conf
+      install -Dm0755 src/go/bin/zabbix_agent2 $out/bin/zabbix_agent2
+
+      # create a symlink which is compatible with the zabbixAgent module
+      ln -s $out/bin/zabbix_agent2 $out/sbin/zabbix_agentd
+    '';
+
+    meta = with lib; {
+      description = "An enterprise-class open source distributed monitoring solution (client-side agent)";
+      homepage = "https://www.zabbix.com/";
+      license = licenses.gpl2Plus;
+      maintainers = [ maintainers.aanderse ];
+      platforms = platforms.linux;
+    };
+  })