diff --git a/flake.lock b/flake.lock
index 019f9a2a..93b03c3d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,8 +2,8 @@
   "nodes": {
     "hydra": {
       "info": {
-        "lastModified": 1586949285,
-        "narHash": "sha256-mXvLmicI1XtturvkuBbt1Fe4MsiGlbbK8Qlg8pyIyY4="
+        "lastModified": 1587633099,
+        "narHash": "sha256-cOsYakp2nJgRY0cP6YNBLV4srP19v6XQEZM7EefS3Kw="
       },
       "inputs": {
         "nix": "nix",
@@ -12,7 +12,7 @@
       "locked": {
         "owner": "ehmry",
         "repo": "hydra",
-        "rev": "59bb3ab8e854cb52782077f2c5a80471d0004ac8",
+        "rev": "e1ae3bd9a4bdaac8ff6878febf2c64fee12544f2",
         "type": "github"
       },
       "original": {
diff --git a/hosts/server7/default.nix b/hosts/server7/default.nix
index 84e06653..05a07eb2 100644
--- a/hosts/server7/default.nix
+++ b/hosts/server7/default.nix
@@ -84,6 +84,11 @@ in {
       }
     '';
   };
+  nixpkgs.overlays = [
+    (self: super: {
+      nix = super.nix // { meta.platforms = lib.platforms.linux; };
+    })
+  ];
 
   virtualisation.docker.enable = true;
 
diff --git a/hosts/server7/hydra.nix b/hosts/server7/hydra.nix
index f0b68f5a..52692b0e 100644
--- a/hosts/server7/hydra.nix
+++ b/hosts/server7/hydra.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, lib, pkgs, ... }:
 
 {
   services.hydra-dev = {
@@ -11,11 +11,13 @@
     # package = pkgs.hydra-unstable;
     listenHost = "172.22.99.245";
     # listenHost = "*";
+    useSubstitutes = true;
+    minimumDiskFree = 2;
+    minimumDiskFreeEvaluator = 2;
     extraConfig = ''
-    <sotest>
-    username = emery
-    password = 36\#KAVMD
-    </sotest>
+      <sotest>
+      authfile = /var/lib/hydra/sotest.auth
+      </sotest>
     '';
   };
 
@@ -28,4 +30,20 @@
     maxJobs = 8;
   }];
 
+  nix.binaryCachePublicKeys =
+    [ "nix-serve.hq.c3d2.de-2:elqZouiiQP4XNfmEekwXH/YRPL1pXlN5JgVSzT1Ctoc=" ];
+  nix.binaryCaches = [ "http://nix-serve.hq.c3d2.de" ];
+
+  services.nginx = {
+    enable = true;
+    virtualHosts = {
+      "server7.hq.c3d2.de" = {
+        addSSL = true;
+        enableACME = true;
+        globalRedirect = "hydra7.hq.c3d2.de";
+      };
+    };
+  };
+
+
 }