diff --git a/krebs/3modules/retiolum.nix b/krebs/3modules/retiolum.nix
index 326dfa7fb..a80c510a5 100644
--- a/krebs/3modules/retiolum.nix
+++ b/krebs/3modules/retiolum.nix
@@ -14,7 +14,7 @@ let
     type = with types; attrsOf (submodule (tinc: {
       options = {
 
-        enable = mkEnableOption "krebs.tinc.${tinc.config._module.args.name}" // { default = true; }; 
+        enable = mkEnableOption "krebs.tinc.${tinc.config._module.args.name}" // { default = true; };
 
         host = mkOption {
           type = types.host;
@@ -124,58 +124,62 @@ let
       };
     }));
   };
+
   imp = {
-    # TODO environment.systemPackages = [ tinc iproute ]; AND avoid conflicts
+    # TODO `environment.systemPackages = [ cfg.tincPackage cfg.iproutePackage ]` for each network,
+    # avoid conflicts in environment if the packages differ
+
     krebs.secret.files = mapAttrs' (netname: cfg:
       nameValuePair "${netname}.rsa_key.priv" cfg.privkey ) config.krebs.tinc;
     users.users = mapAttrs' (netname: cfg:
       nameValuePair "${netname}" {
-      inherit (cfg.user) home name uid;
-      createHome = true;
-      } ) config.krebs.tinc;
+        inherit (cfg.user) home name uid;
+        createHome = true;
+      }
+    ) config.krebs.tinc;
 
     systemd.services = mapAttrs (netname: cfg:
       let
         net = cfg.host.nets.${netname};
-
         tinc = cfg.tincPackage;
-
         iproute = cfg.iproutePackage;
 
         confDir = let
           namePathPair = name: path: { inherit name path; };
         in pkgs.linkFarm "${netname}-etc-tinc" (mapAttrsToList namePathPair {
-          "hosts" = cfg.hostsPackage;
-          "tinc.conf" = pkgs.writeText "${cfg.netname}-tinc.conf" ''
-            Name = ${cfg.host.name}
-            Interface = ${netname}
-            ${concatStrings (map (c: "ConnectTo = ${c}\n") cfg.connectTo)}
-            PrivateKeyFile = ${cfg.privkey.path}
-            ${cfg.extraConfig}
-          '';
-          "tinc-up" = pkgs.writeDash "${netname}-tinc-up" ''
-            ${iproute}/sbin/ip link set ${netname} up
-            ${optionalString (net.ip4 != null) /* sh */ ''
-              ${iproute}/sbin/ip -4 addr add ${net.ip4.addr} dev ${netname}
-              ${iproute}/sbin/ip -4 route add ${net.ip4.prefix} dev ${netname}
-            ''}
-            ${optionalString (net.ip6 != null) /* sh */ ''
-              ${iproute}/sbin/ip -6 addr add ${net.ip6.addr} dev ${netname}
-              ${iproute}/sbin/ip -6 route add ${net.ip6.prefix} dev ${netname}
-            ''}
-          '';
-        });
+            "hosts" = cfg.hostsPackage;
+            "tinc.conf" = pkgs.writeText "${cfg.netname}-tinc.conf" ''
+              Name = ${cfg.host.name}
+              Interface = ${netname}
+              ${concatStrings (map (c: "ConnectTo = ${c}\n") cfg.connectTo)}
+              PrivateKeyFile = ${cfg.privkey.path}
+              ${cfg.extraConfig}
+            '';
+            "tinc-up" = pkgs.writeDash "${netname}-tinc-up" ''
+              ${iproute}/sbin/ip link set ${netname} up
+              ${optionalString (net.ip4 != null) /* sh */ ''
+                ${iproute}/sbin/ip -4 addr add ${net.ip4.addr} dev ${netname}
+                ${iproute}/sbin/ip -4 route add ${net.ip4.prefix} dev ${netname}
+              ''}
+              ${optionalString (net.ip6 != null) /* sh */ ''
+                ${iproute}/sbin/ip -6 addr add ${net.ip6.addr} dev ${netname}
+                ${iproute}/sbin/ip -6 route add ${net.ip6.prefix} dev ${netname}
+              ''}
+            '';
+          }
+        );
       in {
-          description = "Tinc daemon for ${netname}";
-          after = [ "network.target" ];
-          wantedBy = [ "multi-user.target" ];
-          requires = [ "secret.service" ];
-          path = [ tinc iproute ];
-          serviceConfig = rec {
-            Restart = "always";
-            ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${cfg.user.name} -D --pidfile=/var/run/tinc.${SyslogIdentifier}.pid";
-            SyslogIdentifier = netname;
-          };
-        } ) config.krebs.tinc;
+        description = "Tinc daemon for ${netname}";
+        after = [ "network.target" ];
+        wantedBy = [ "multi-user.target" ];
+        requires = [ "secret.service" ];
+        path = [ tinc iproute ];
+        serviceConfig = rec {
+          Restart = "always";
+          ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${cfg.user.name} -D --pidfile=/var/run/tinc.${SyslogIdentifier}.pid";
+          SyslogIdentifier = netname;
+        };
+      }
+    ) config.krebs.tinc;
   };
 in out