diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index fd0cbd2..dbd93ba 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -5,7 +5,7 @@
 { config, pkgs, ... }:
 
 let
-  unstable = import <nixos-unstable> { };
+  unstable = import <nixos-unstable> {};
 
 in
 {
@@ -78,7 +78,6 @@ in
   programs.wireshark =
     {
       enable = true;
-      package = pkgs.wireshark;
     };
 
   programs.adb.enable = true;
@@ -96,8 +95,8 @@ in
   # Open ports in the firewall.
   # networking.firewall.allowedTCPPorts = [ ... ];
   # networking.firewall.allowedUDPPorts = [ ... ];
-  networking.firewall.allowedTCPPortRanges = [{ from = 1714; to = 1764; }];
-  networking.firewall.allowedUDPPortRanges = [{ from = 1714; to = 1764; }]; # for KDE connect
+  networking.firewall.allowedTCPPortRanges = [ { from = 1714; to = 1764; } ];
+  networking.firewall.allowedUDPPortRanges = [ { from = 1714; to = 1764; } ]; # for KDE connect
   # Or disable the firewall altogether.
   # networking.firewall.enable = false;
 
@@ -181,36 +180,9 @@ in
   services.smartd =
     {
       enable = true;
-      devices = [{ device = "/dev/sda"; } { device = "/dev/sdb"; }];
+      devices = [ { device = "/dev/sda"; } { device = "/dev/sdb"; } ];
     };
 
-  # block certain sites to prevent procrastination
-  systemd.services.procrastinationstop = {
-    serviceConfig.Type = "oneshot";
-    wantedBy = [ ];
-    script = ''
-      ln -sf ${pkgs.writeText "blockedHosts" ''
-        ::1   twitter.com
-        127.0.0.1   twitter.com
-        ::1   api.twitter.com
-        127.0.0.1   api.twitter.com
-        ::1   toot.matereal.eu
-        127.0.0.1   toot.matereal.eu
-        ::1   tagesschau.de
-        127.0.0.1   tagesschau.de
-        ::1   dnn.de
-        127.0.0.1   dnn.de
-        ''} /etc/hosts
-    '';
-  };
-
-  systemd.services.procrastinationstart = {
-    serviceConfig.Type = "oneshot";
-    wantedBy = [ ];
-    script = ''
-      ln -sf /etc/static/hosts /etc/hosts
-    '';
-  };
 
   fonts = {
     fontDir.enable = true;
@@ -235,12 +207,12 @@ in
 
   # declarative containers
   containers = {
-    #  hash2PubSim = import ./Hash2PubTestbed.nix
-    #    {
-    #      inherit pkgs config;
-    #      experimentUid = config.users.users.spiollinux.uid;
-    #      projectDir = "/home/spiollinux/Seafile/Studium/Semester11/INF-PM-FP-ANW";
-    #    };
+  #  hash2PubSim = import ./Hash2PubTestbed.nix
+  #    {
+  #      inherit pkgs config;
+  #      experimentUid = config.users.users.spiollinux.uid;
+  #      projectDir = "/home/spiollinux/Seafile/Studium/Semester11/INF-PM-FP-ANW";
+  #    };
   };
 
   # stop NetworkManager from managing virtual interfaces