diff --git a/config/hosts/beltane/nixos.nix b/config/hosts/beltane/nixos.nix
index 9170e39f..cb6fab8c 100644
--- a/config/hosts/beltane/nixos.nix
+++ b/config/hosts/beltane/nixos.nix
@@ -107,6 +107,7 @@ with lib;
     dns.dynamic = true;
     addresses = {
       private = {
+        enable = true;
         ipv4.address = "192.168.1.2";
         # TODO ipv6.address
       };
diff --git a/config/hosts/samhain/nixos.nix b/config/hosts/samhain/nixos.nix
index 1eb0f58f..8c82ea4f 100644
--- a/config/hosts/samhain/nixos.nix
+++ b/config/hosts/samhain/nixos.nix
@@ -211,6 +211,7 @@ in
   network = {
     addresses = {
       private = {
+        enable = true;
         ipv4.address = "192.168.1.1";
       };
     };
diff --git a/config/hosts/yule/nixos.nix b/config/hosts/yule/nixos.nix
index af8a798c..8756d2f1 100644
--- a/config/hosts/yule/nixos.nix
+++ b/config/hosts/yule/nixos.nix
@@ -78,6 +78,7 @@ with lib;
   network = {
     addresses = {
       private = {
+        enable = true;
         ipv4.address = "192.168.1.3";
       };
     };
diff --git a/nix/sources.json b/nix/sources.json
index 79f48100..ec0c5901 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -89,10 +89,10 @@
         "homepage": null,
         "owner": "kittywitch",
         "repo": "nixexprs",
-        "rev": "e0e9a344579d663eccc1c5785f7ba53a898b2a7c",
-        "sha256": "1m33scc5kppl9ydra3ccm2dzb11pgrgjr48fkx7isxjff88lnahy",
+        "rev": "61d795bc2b8a6afb1c55c7348fab87a2d333c2ce",
+        "sha256": "0nwj244yzlljskk20rpnl3lzn0ii85vh60ri4id9gfm4pd18mcjc",
         "type": "tarball",
-        "url": "https://github.com/kittywitch/nixexprs/archive/e0e9a344579d663eccc1c5785f7ba53a898b2a7c.tar.gz",
+        "url": "https://github.com/kittywitch/nixexprs/archive/61d795bc2b8a6afb1c55c7348fab87a2d333c2ce.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "niv": {