diff --git a/docs/modules/ROOT/pages/index.adoc b/docs/modules/ROOT/pages/index.adoc
index 9bda09c..24f5368 100644
--- a/docs/modules/ROOT/pages/index.adoc
+++ b/docs/modules/ROOT/pages/index.adoc
@@ -148,7 +148,7 @@ Describe containers using NixOS-style modules. There are a few options:
   project.name = "full-nixos";
   services.webserver = { pkgs, lib, ... }: {
     nixos.useSystemd = true;
-    nixos.configuration.boot.tmpOnTmpfs = true;
+    nixos.configuration.boot.tmp.useTmpfs = true;
     nixos.configuration.services.nginx.enable = true;
     nixos.configuration.services.nginx.virtualHosts.localhost.root = "${pkgs.nix.doc}/share/doc/nix/manual";
     nixos.configuration.services.nscd.enable = false;
diff --git a/examples/full-nixos/arion-compose.nix b/examples/full-nixos/arion-compose.nix
index cd3f150..825aaed 100644
--- a/examples/full-nixos/arion-compose.nix
+++ b/examples/full-nixos/arion-compose.nix
@@ -2,7 +2,7 @@
   project.name = "full-nixos";
   services.webserver = { pkgs, lib, ... }: {
     nixos.useSystemd = true;
-    nixos.configuration.boot.tmpOnTmpfs = true;
+    nixos.configuration.boot.tmp.useTmpfs = true;
     nixos.configuration.networking.useDHCP = false;
     nixos.configuration.services.nginx.enable = true;
     nixos.configuration.services.nginx.virtualHosts.localhost.root = "${pkgs.nix.doc}/share/doc/nix/manual";
diff --git a/src/haskell/testdata/Arion/NixSpec/arion-compose.nix b/src/haskell/testdata/Arion/NixSpec/arion-compose.nix
index 40c5907..53cf594 100644
--- a/src/haskell/testdata/Arion/NixSpec/arion-compose.nix
+++ b/src/haskell/testdata/Arion/NixSpec/arion-compose.nix
@@ -2,7 +2,7 @@
   project.name = "unit-test-data";
   services.webserver = { pkgs, ... }: {
     nixos.useSystemd = true;
-    nixos.configuration.boot.tmpOnTmpfs = true;
+    nixos.configuration.boot.tmp.useTmpfs = true;
     nixos.configuration.services.nginx.enable = true;
     nixos.configuration.services.nginx.virtualHosts.localhost.root = "${pkgs.nix.doc}/share/doc/nix/manual";
     service.useHostStore = true;